10 Best 45l Backpacks [2025]
This post contains affiliate links. As an Amazon Associate, we earn from qualifying purchases.
Finding the perfect 45L backpack can feel like a daunting challenge, especially with the overwhelming number of options available on the market today. Whether you’re a seasoned adventurer or a casual weekend hiker, there are countless factors to consider, from comfort and durability to storage capacity and design. With so many brands and models to choose from, it’s easy to become bogged down in the details, making the selection process both time-consuming and frustrating.
To make your search simpler, we have carefully curated a list of the best 45L backpacks available. Our team has spent hours researching and reviewing various products, taking into account user feedback, expert opinions, and essential features that matter most to outdoor enthusiasts. By narrowing down the vast selection to just ten top contenders, we aim to save you time and hassle, allowing you to focus on what truly matters: preparing for your next adventure. Each of our chosen backpacks is designed to meet different needs and preferences, ensuring that there’s something for everyone.
Top 10 45l Backpacks In The Market
Best 45l Backpacks Review
Bestseller No. 1
MATEIN 45L Travel Backpack, Large Carry on Backpack for Men Women, Water...
- Expandable & Large Capacity: Dimension:20*8.6*13.4inch This extra large travel backpack with expandable feature offers you more packing capacity. Unzipping to get extra storage then can easily hold packing cubes, make-up bag, outfits, camera bag and gear, etc. It is designed for men, women, weekend traveler, or occasional vacationer. This versatile luggage backpack also meets airline carry-on requirements
- Convertible Design: The carry on backpack is designed with hideaway padded shoulder straps which can be easily stored away in zippered back panel, transforming this vacation backpack from carry-on duffel to briefcase style and provide you a more flexible carrying experience. A luggage strap on the back is designed to fit on luggage/suitcase, for easier carry on international travel or cruise. A great gifts for people who travel
- Easy to Carry: The luggage backpack is light to carry due to its adjustable shoulder straps, comfortable air-mesh ventilated back panel. 2 padded grab handles are set on the top and the side of the travel backpack, making it easily to take the bag from an overhead bin. Gift choice for Thanksgiving Day, Christmas, New Year, Valentine's Day, also available as travelers gifts
- Built for Travel: Front compartment is for little gear such as phone, earphone. The large inside pocket has internal compression elastic straps. The padded straps include a sternum strap that can be adjusted upward or downward, set to go across your chest, relieving the weight from your shoulder. 4 external compression straps keep contents from sloshing around and can get an inch or 2 more of vertical space also reduced stress on the zippers
- Heavy-duty: This large travel backpack is made of water resistant lightweight polyester with lockable zipper heads. Could be survived in different temperatures. With sturdy zippers and decent stitching, this backpack won't show any defects when on the go, ensuring you an unforgettable weekend getaway. Does your partner like to travel? It's an ideal gifts for traveler. It's also a practical Christmas and New Years gift for your parents, traveler
Bestseller No. 2
LOVEVOOK Carry on Backpack, 45L Large Travel Backpack for Women Men Airline...
- [45L EXPANDABLE TRAVEL BACKPACK] This versatile backpack expands from 35L to an impressive 45+L, perfect for 3-7 days of travel. It fits 3-4 sets of clothes, shoes (with a separate bag), and daily essentials, plus a 17.3-inch laptop. It is an ideal travel backpack for men and women! NOTE: This backpack is larger in size, so we recommend considering your needs before purchasing.
- [AIRLINE APPROVED] Weight: about 4 lbs. This carry on backpack the size before expansion is 20*14*7 Inces, and the size after expansion is 20*14*9 Inces, which conforms to the size (22*14*9 Inces ) regulations of most airlines for carry on baggage, such as Delta Air Lines, Alaska Airlines, Southwest Airlines, United Airlines. It’s a carry on backpack airline approved and 180-degree zipper closure to get you through security quickly
- [EXTRA 4 PACKING CUBES] Travel backpack with four packing cubes. large cube for sweaters, jackets, pants. Medium cube for shirts, shorts. Small cube for toiletries such as makeup, cleanser, etc, there's also a shoe pocket. Keeping your belongings neater and more organized. without a doubt it’s a large travel backpack. If your clothes get wet, don't worry, there is a wet pocket at the top of the large compartment, which can hold 2 T-shirts or towels
- [FOR TRAVEL] This carry on backpack is flight approved, you can travel anywhere you want, it has a side handle, it can be turned into a suitcase backpack, and there is a luggage strap on the back, which can be placed on the luggage, it's very convenient to carry. Breathable sponge mesh design on the backside and shoulder straps help for the air convection, ventilation, and heat elimination and help relieve the stress from your shoulder. It’s a nice personal item backpack
- [WORRY-FREE QUALITY]Discover our weekend backpack,engineered for durability with tear-resistant,waterproof canvas,and featuring breathable,foam-padded shoulder straps for added comfort.Reinforced straps and buckles around the pack ensure robustness for travel,camping,or any weekend adventure.LOVEVOOK PERFECT SERVICE-Our sellers attach much importance to our customer's shopping experience,Any questions,please feel free to contact us.LOVEVOOK backpack will provide you with 24-hour customer service
Bestseller No. 3
Peak Design Travel Line Backpack 45L (Black) BTR-45-BK-2
- Modular Bag System by Peak Design, customise the internal carry options to match your requirements
- Meets international max carry-on standards in default 35L configuration. Dual expansion zips give 10L extra volume for 45L max storage.
- Dual side zippers for instant camera and item access. Full rear access via large dual zips.
- Quick tablet and laptop access using the main back zip.
- Packing Tools, Camera Cubes, Tech Pouch and Wash Kit compliment the Travel Line Backpack and are available separately.
Bestseller No. 4
WOLFpak 45L Backpack (Nightshade Edition) Camping, Hiking, Gym Backpack
- Waterproof and Durable: Made of Waterproof Oxford 1000D polyester, this MOLLE backpack is load-tested up to 35lbs, ensuring longevity. The YKK Japanese two-way, water-resistant zippers and 180-degree opening make this item a tactical backpack that's both reliable and easy to use.
- Express Your Personality: Customize this military tactical backpack with removable patches on the built-in Velcro space. Two patches with the messages "Trust Your Instincts" and "Be A Wolf" are included.
- On-the-Go Convenience: The WOLFpak travel backpack has two cup holders for carrying your water bottle or tumbler. The protective inside computer pouch (10in x 10in) provides a secure and padded space for your laptop or tablet, making this item a practical and convenient laptop backpack.
- Logo Wolf Head Included
Bestseller No. 5
Peak Design Travel Line Backpack 45L (Sage) (Expandable 30-35-45L)
- Modular Bag System by Peak Design, customise the internal carry options to match your requirements
- Meets international max carry-on standards in default 35L configuration. Dual expansion zips give 10L extra volume for 45L max storage.
- Dual side zippers for instant camera and item access. Full rear access via large dual zips.
- Quick tablet and laptop access using the main back zip.
- Packing Tools, Camera Cubes, Tech Pouch and Wash Kit compliment the Travel Line Backpack and are available separately.
Bestseller No. 6
QT&QY Military Tactical Backpacks For Men Molle Daypack 45L Large 3 Day Bug Out...
- 【THE SPACE YOU NEED】This Military Tactical backpack size appro：18inch x 13.2inch x 11.6inch dimensions and appropriately sized 45L capacity, this pack has room for all of your essential gear. Large multi-layer interior storage compartments can accommodate a lot of outdoor equipment, and also meet your daily travel needs. large area of Velcro, make the backpack different with other backpacks, you can paste any patch you like. .one US flag patch for gift(can be removed)
- 【DURABLE & WATERPROOF】Military grade backpack is made from 900D polyester material, tactical assault backpack is reinforced and double stitched at all stress points. Resistant and tough and our Special coating makes our training backpack both water resistant and scratch proof
- 【MOLLE MODULAR DESIGN】 Molle backpack webbing system on front and sides, designed to be used in combination with other equipment, you can attaching extra pouches or gears as tactical backpack; such as kettle pouch, walkie-talkie pouch, first-aid pouch, torch pouch, sundries pouch and also the sleeping bag and mat
- 【MULTIPLE COMPARTMENTS】designed with 5 compartments for storing different stuff: two front pockets for small items, two large compartments with built-in zippered pocket and mesh pocket for big and important supplies, dedicated laptop/device compartment (17''), a hidden back pocket for frequently-used items, army military backpack opens flat to 180 degrees for easy packing/unpacking.Tactical backpack has bottle holder on both side of backpack, can fit for 750ml water bottle, umbrellas or tools
- 【COMFORT & FUNCTION】This sports fitness daypack double stitched, padded shoulder straps and back area with mesh backing for comfort, ventilation, and strength during travel. high-quality brand two-way zipper, all compartments have two-way openings for easy access. Easy adjustable waist straps to keep the waist strap from sliding loose through the buckles. Hundreds of uses including as 3 day assault pack, Bug out bag, survival backpack, army backpack, hunting backpack, trekking backpack
Bestseller No. 7
tomtoc Travel Backpack 40L, TSA Friendly Flight Approved Carry-on Luggage Hand...
- Large Capacity & Organized: Dimensions: 20.47 x 13.39 x 9.06 inch. Depending on the packing methods and contents, the actual usable capacity ranges between 38-40L. This carry-on backpack provides ample space for all your travel essentials. It features a large main compartment with a separate laptop compartment, and several other pockets and compartments for organization
- Convenient Storage: You can reach the main compartment from the quick access front pocket for easy reach of your travel essentials on the go, and the main compartment can also be unzipped like a suitcase for easy packing and unpacking; The tech compartment can accommodate up to 17" laptop and 13 inch iPad with accessories; Front pocket, top pocket and side pockets for easy access to glasses, documents and travel liquids, etc.
- TSA Friendly & Flight Approved: The laptop compartment is friendly designed to be opened 90°-180° for security scanning, helps get through airport security checkpoints quick and easy; And the dimension meets the maximum size requirements by IATA flight, it's ideal for airplane traveling
- Built to Last and Sustainable: Made of premium quality YKK zippers and durable recycled fabric—that is 100% post-consumer material made from PET plastic bottles, which is sustainable and can also reduce energy consumption and pollution; Keep traveling with the best recycled fabric! The results might surprise you
- Ultra-comfortable & Easy Carry: 3D padded back panel and contoured thick shoulder straps for superior ergonomic comfort. An adjustable chest buckle help transfer weight off your shoulders, keeping you relaxed and cozy all the time; Two handles, one on top and one on the side provide flexible carrying experience. A strap on the back for luggage pass-through for convenient carry
Bestseller No. 8
BANGE 45L Expandable Backpack, Water Resistant, Suitable for Travel, College...
- 【26-45L Expand Backpack】: Before extended is 26L, dimensions are 19.5x13x6.8inch; after extended is 45L, dimensions are 19.5x13x11.5inch. You can expand the zipper and buckles according to your requirement. The two handles set on top and one side, which allow an easy switch between backpack and suitcase. So it can be carried vertically or horizontally. The luggage belt on the back allows being slide over the luggage tube,backpack very easy to carry, it is great for 3-7days daily travel.
- 【Large Capacity Carry On Backpack】:The backpack with many compartments, organization and expansion.The main pocket can hold your travel goods,fit 5-8pcs clothes. It is cool that there is a wet pouch to liquids.Front compartment can also hold magazines,Ipad and power bank which can charge your phone. The dry-wet separation pocket can hold your personal washing items during your business trip.
- 【17.3Inch Laptop Backpack】: Baneg 45L travel backpack has a separate laptop compartment, which can hold 17.3 inch laptop and protect laptop from moving. With high quality waterproof PVC material, your laptop can be prevent wet in the raining days.
- 【Multipurpose Backpack】: With the expand function, you can use the backpack for daily work or commute, you only need to close the expansion zipper. When you need to travel or long business trip, you can open the expansion zipper to hold your clothes or other important items. Different compartments with different sizes and features make you to storage items easily and neatly. A great companion for commuting, business trip, hiking, travel, camping and other outdoor activities.
- 【Weekend Backpack With USB Charging】: BANGE travel backpack ensure a secure long-lasting usage everyday or weekend. It is convenient to charge your phone from outside due to there is a USB charging port, and you only need to place a power bank in the backpack. This item is not intended for use by children 12 and under.
Bestseller No. 9
Peak Design Travel Line Backpack 45L (Coyote) (Expandable 30-35-45L)
- Modular Bag System by Peak Design, customise the internal carry options to match your requirements
- Meets international max carry-on standards in default 35L configuration. Dual expansion zips give 10L extra volume for 45L max storage.
- Dual side zippers for instant camera and item access. Full rear access via large dual zips.
- Quick tablet and laptop access using the main back zip.
- Packing Tools, Camera Cubes, Tech Pouch and Wash Kit compliment the Travel Line Backpack and are available separately.
Bestseller No. 10
Alliance Backpack, 45L Capacity, Wet and Dry Compartments, Team Colors,...
- STORAGE: 45L Capacity, maximizes storage without the bulk. Multiple external compartments for easy organization, mesh water bottle pocket
- WET and DRY: stay that way with pockets designed for each. Includes Spring Hooks for wetsuits. The perfect bag for the Pool, beach, travel and more
- ERGONOMIC: stay comfortable with ergonomic straps, contoured back, and lumbar support. Durable water resistant backpack
- ELECTRONICS POCKET: keep computers and electronics safely tucked into their own pocket, away from wet suits, towels and caps
- TYR Sport was established in 1985 to provide the competitive swim market with innovative technical swimwear. Since its inception, TYR has grown to exist as one of the world’s most recognizable swimming and fitness brands
Bottom Line
In conclusion, our selection of the best 45L backpacks is the result of thorough research and careful evaluation of various factors, including durability, comfort, functionality, and user reviews. We meticulously analyzed a wide range of products, considering the feedback from adventurers, travelers, and outdoor enthusiasts alike. Each backpack on our list offers a unique combination of features tailored to meet different needs, whether you’re embarking on a multi-day hike, traveling internationally, or simply seeking a reliable pack for everyday use.
By following our curated list, you can confidently choose a 45L backpack that suits your specific requirements. Each recommended product has been tested and vetted for performance, ensuring you make a sound investment. These backpacks not only provide ample space for your gear but also enhance your overall experience with their thoughtful designs and practical features. We hope our insights will assist you in making an informed decision, empowering you to embark on your next adventure with the right companion on your back.
