Choosing the right 40L hiking backpack is important for every outdoor lover. A 40-liter pack offers enough space for your gear while staying lightweight. Whether you’re into outdoor hiking or fun cycling trips, the backpacks listed below are built for comfort and function.
Why 40L is the Perfect Size for Hiking
A 40-liter backpack is perfect for one-day hikes or short overnight trips. It has enough room for food, clothes, a sleeping bag, and a small tent. It’s big enough to carry what you need but not too heavy to slow you down.
What to Look for in a 40L Hiking Backpack
Comfort and Fit
Comfort is the most important thing when picking a hiking backpack. Look for padded shoulder straps, a breathable back panel, and a good hip belt. These features help reduce stress on your shoulders and back.
Durability
Choose a backpack made from strong materials like ripstop nylon or polyester. These fabrics can handle rough weather and heavy use.
Weight
Lighter backpacks are easier to carry, especially on long hikes. Make sure the pack is lightweight but still strong enough to support your gear.
Compartments and Access
Multiple pockets help you stay organized. A front pocket is great for maps, while side pockets can hold water bottles. Some backpacks also have top-loading and front-zip access.
Hydration Compatibility
Some hiking backpacks come with a special space for a hydration bladder. This feature lets you drink water easily while hiking without stopping to pull out a bottle.
Top 6 Best 40L Hiking Backpacks in 2025
1. Osprey Talon 44 (Men) / Tempest 40 (Women)
Why It’s Great: Osprey is known for comfort and design. The Talon and Tempest series have a strong frame, breathable mesh, and excellent support. They fit close to your body and work well for day hikes and weekend trips.
Key Features:
- Adjustable torso length
- External hydration sleeve
- Stretchy side and front mesh pockets
- Built-in rain cover
Best For: All-around hiking and fun hiking trips.
2. Deuter Futura 40L
Why It’s Great: Deuter’s Aircomfort system makes this backpack one of the most breathable packs on the market. It keeps your back cool and dry during long hikes.
Key Features:
- Aircomfort Sensic mesh back system
- Large zippered front access
- Separate bottom compartment
- Hydration system compatible
Best For: Long, hot hikes and people who sweat a lot.
3. Gregory Zulu 40 / Jade 38
Why It’s Great: Gregory’s FreeFloat dynamic suspension lets the pack move with you. It makes hiking more comfortable on uneven terrain.
Key Features:
- Ventilated back panel
- Flexible hip belt for better movement
- Top and front access
- Rain cover included
Best For: Technical hikes and people who want a secure fit.
4. REI Co-op Trail 40
Why It’s Great: REI’s Trail 40 is budget-friendly but still packed with features. It has a U-shaped zip that opens like a suitcase, making it easy to pack and unpack.
Key Features:
- Panel-loading design
- Multiple internal and external pockets
- Padded hip belt with pockets
- Hydration reservoir compatible
Best For: Weekend trips and beginner hikers.
5. Kelty Redwing 40
Why It’s Great: This backpack blends hiking and travel features. The hybrid top and panel loader offers multiple ways to access your gear.
Key Features:
- Perfect balance of space and organization
- Load-lifter straps and sternum strap
- HDPE frame sheet for support
- Side compression straps
Best For: Travel and outdoor cycling adventures.
6. Granite Gear Crown 2 38L
Why It’s Great: Although slightly under 40L, the Crown 2 is ultralight and highly adjustable. You can remove the frame and hip belt to reduce weight even more.
Key Features:
- Roll-top main compartment
- Removable lid and frame
- Lightweight design (less than 2 lbs)
- Side and front stretch pockets
Best For: Ultralight hikers and minimalist packers.
Tips for Choosing the Right Backpack for You
Try It On
Try the backpack on in-store or buy from a shop with a good return policy. Make sure it fits your body and feels comfortable.
Pack It First
Put some weight in the backpack before testing. This helps you see how it handles when fully loaded.
Think About Use
Are you going on day hikes or multi-day trips? Do you need space for gear like climbing ropes or camera equipment? Choose a backpack that matches your needs.
Don’t Forget Rain Protection
A rain cover is essential if you plan to hike in wet weather. Some backpacks include one, but you can also buy one separately.
How to Pack a 40L Backpack
Knowing how to pack your 40L backpack helps improve comfort and balance.
Bottom: Sleeping bag, clothes you won’t need during the day
Middle: Heaviest gear like food or stove
Top: Items you need quickly like snacks, rain jacket
Pockets: Water bottle, maps, sunscreen, sunglasses
Conclusion: The Right Pack Makes a Big Difference
A good 40L hiking backpack helps you carry your gear comfortably and safely. It’s a smart choice for short hikes, weekend adventures, and outdoor cycling trips. Whether you’re a beginner or an experienced hiker, one of these six backpacks will meet your needs.
Remember, comfort and fit are the most important factors. Try a few options and pick the one that feels right. With the right backpack, every trail becomes more enjoyable.
Related topics
- What to Wear for a Day Hike: A Complete Guide
- What to Wear Hiking in Hot Weather
- What to Look for in Good Hiking Boots