10 Best 45-liter Backpacks [2025]
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Finding the perfect 45-liter backpack can be a daunting task, especially when navigating a market flooded with countless options. From varying features, weight capacities, materials, and designs to individual preferences and specific use cases, the process can quickly become overwhelming. Whether you’re gearing up for a multi-day trek, a weekend camping trip, or just need a reliable bag for daily adventures, the sheer number of choices can leave even the most seasoned outdoor enthusiasts feeling perplexed.
To help simplify your search, we’ve meticulously curated a list of the best 45-liter backpacks on the market. Our selection process involved thorough research, user reviews, and expert recommendations to identify ten standout products that cater to a range of activities and preferences. By highlighting these top choices, we aim to save you time and hassle, ensuring that you can find the ideal backpack that meets your needs without sifting through endless options. Dive into our recommendations and discover the perfect companion for your next adventure.
Top 10 45-liter Backpacks In The Market
Best 45-liter 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
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. 3
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. 4
TETON 45L Scout Internal Frame Backpack for Hiking, Camping, Backpacking, Rain...
- NOT YOUR BASIC BACKPACK: Feature rich at this price point; Comfort and balanced backpack for men and women.
- TETON TOUGH: The best memories are made with the great durable gear; Perfect for any Adventure; comes in 45L, 55L or 65L sizes and adjustable to fit all; Pocket for Hydration
- CUSTOM COMFORT: Multi position torso adjustment fits medium and tall adventurers; Durable open-cell foam lumbar pad and molded channels provide maximum comfort and airflow; For beginners or experienced Backpackers
- DESIGNED WITH YOU IN MIND: Great quality and thoughtful design; large sleeping bag compartment, multi directional compression straps, with spacious compartments and pockets, a place for everything
- TETON SPORTS PROMISE: Reach out to our AMAZING product support team if you have any questions or concerns; YOU CAN COUNT ON US to get you taken care of and back OUTDOORS
Bestseller No. 5
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. 6
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. 7
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. 8
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. 9
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
Bestseller No. 10
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.
Bottom Line
In conclusion, selecting the right 45-liter backpack can significantly enhance your outdoor experience, whether you are trekking through the mountains, embarking on a weekend camping trip, or traveling across cities. The ten products we have highlighted in this article have been meticulously chosen based on criteria such as durability, comfort, functionality, and user reviews. Our comprehensive research involved analyzing expert opinions, customer feedback, and performance tests to ensure that each backpack on our list meets the high standards expected by adventurers and casual users alike.
By following our curated list of the best 45-liter backpacks, you can confidently make a purchase that aligns with your specific needs and preferences. Each option is designed to provide ample storage while ensuring comfort and ease of use, making your journeys more enjoyable and hassle-free. Whether you’re an experienced hiker or new to the world of outdoor adventures, these backpacks will support you in carrying your essentials securely and efficiently. Embrace your next adventure with the right gear, and let our recommendations guide you towards a backpack that will serve you well on your travels.
