On this page
To choose a daypack, start with what you will carry and where: a short city day needs far less space and structure than a long mountain hike. Pick a capacity that fits your typical load, then check fit, hip belt, ventilation, pockets and access. Comfort on your back for several hours matters more than any single feature.
This buying guide explains how to size a daypack in liters, how to get the right fit, which features matter for hiking compared with travel and city use, and how materials and water resistance affect durability. It focuses on criteria and trade-offs so you can compare any daypack, rather than on specific models.
Key takeaways
- Most people find 15 to 30 liters covers day hikes and city days.
- Torso length and hip belt fit matter more than capacity for comfort.
- Hiking daypacks favor ventilation, water access and load support.
- Travel daypacks favor organization, security and a laptop sleeve.
- Pack your usual load and try the bag on before you decide.
What should you look for in a daypack?
Look for a daypack with the right capacity for your usual load, a comfortable fit for your torso length, padded and adjustable shoulder straps, and a hip belt if you carry more than a few pounds. Then compare ventilation, pocket layout, hydration compatibility, materials and weight against how you will use it most.
Here are the main factors to compare, in rough order of importance.
| Factor | What to check | Why it matters |
|---|---|---|
| Capacity | Liters of volume | Room for layers, food and water |
| Fit | Torso length, strap shape | Comfort over hours |
| Load support | Hip belt, frame sheet | Moves weight off shoulders |
| Ventilation | Back panel design | Less sweat on warm days |
| Access | Top loader or panel loader | How easily you reach gear |
| Pockets | Bottle, hip belt, lid pockets | Quick access to small items |
| Materials | Fabric weight, coating | Durability and weather resistance |
| Weight | Empty pack weight | Lighter is easier to carry all day |
What size daypack do you need?
The daypack size you need depends on how long you are out and what you carry. A pack of roughly 10 to 20 liters suits short hikes, errands and summer days. Around 20 to 30 liters suits longer hikes and cooler weather, and 30 to 35 liters or more suits winter, long days or carrying gear for others.
Capacity is measured in liters, but brands measure in slightly different ways. Use the number as a guide, then look at the pack’s shape and pockets, since two packs with the same volume can carry very differently.
| Capacity | Best for | Typical contents |
|---|---|---|
| About 10 to 20 liters | Short hikes, city days, running errands | Water, snack, light jacket |
| About 20 to 30 liters | Most day hikes, travel days | Water, lunch, layers, first aid, Ten Essentials |
| About 30 to 35 liters or more | Long days, winter, carrying for kids | Extra layers, more food and water, larger kit |
On hikes, plan space for the Ten Essentials, which include navigation, a headlamp, sun protection, first aid and extra food, water and clothing. Our guide to the Ten Essentials for hiking explained helps you work out how much room these really need.
Tip: Lay out everything you usually carry on a typical day, including a warm layer and full water bottles, before you shop. Take it with you, or note how much space it fills, to judge capacity.
How should a daypack fit?
A daypack should sit close to your back with the weight resting high and centered, shoulder straps wrapping comfortably without gaps, and a hip belt, if present, sitting on your hip bones. The pack’s back length should match your torso length so the straps and belt land in the right places. Nothing should pinch, rub or pull you backward.
Smaller daypacks often come in one size, while larger ones may offer sizes or adjustable back lengths. Torso length is measured from the bony bump at the base of your neck to the top of your hip bones.
Quick fit check
- Load the pack with the weight you usually carry.
- Loosen all straps, put the pack on and fasten the hip belt over your hip bones.
- Tighten the shoulder straps until they wrap your shoulders without lifting the belt.
- Clip the chest strap a little below your collarbones.
- Walk around, bend, and climb stairs to test stability.
- Check that the straps do not dig into your neck or armpits.
Our step-by-step guide on how to fit a hiking backpack explains each adjustment in more detail, and it applies to larger daypacks too.
Fit for different bodies
Many brands make packs with shorter torso lengths, narrower shoulder straps and differently shaped hip belts, often labeled for women. These suit anyone whose body fits that shape. Try both styles and choose the one that feels best, rather than going by the label.
Do you need a hip belt and frame on a daypack?
You need a hip belt and some kind of frame when you carry more than a light load or walk for several hours. A padded hip belt shifts weight onto your hips, and a frame sheet helps the pack hold its shape. For short walks and city days, a simple webbing belt or none at all is usually enough.
- No belt: fine for light loads and short outings
- Webbing belt: stops the pack swinging, adds little weight
- Padded hip belt: carries real weight and often has pockets for snacks or a phone
- Frame sheet or stays: keeps heavier loads stable and off your back
Heavier loads, such as carrying water for a hot hike or extra layers in winter, are when these features earn their weight.
Which daypack features matter for hiking?
For hiking, the daypack features that matter most are a ventilated back panel, easy-reach water bottle pockets or a hydration sleeve, a supportive hip belt, attachment points for trekking poles, and a rain cover or water-resistant fabric. A stretchy front pocket for a jacket is also useful when the weather changes during the day.
| Feature | Benefit on the trail |
|---|---|
| Ventilated back panel | Less sweat and more airflow |
| Hydration sleeve and port | Drink without stopping |
| Side bottle pockets | Reach water while walking |
| Hip belt pockets | Snacks, phone or sunscreen at hand |
| Trekking pole loops | Store poles when not in use |
| Stretch front pocket | Quick storage for a wet jacket |
| Rain cover | Protects gear in heavy rain |
| Whistle on sternum strap | Simple emergency signaling |
Suspended mesh back panels create a gap between your back and the pack for airflow, but they can shift the load slightly away from your body. Foam panels with channels hold the load closer but breathe less. Choose based on how hot your hikes are and how much you carry.
Which daypack features matter for travel and city use?
For travel and city use, prioritize organization, security and comfort for carrying through airports and streets. Useful features include a padded laptop sleeve, a clamshell opening for easy packing, internal organizer pockets, lockable or hidden zippers, and a slim profile that fits under airline seats. A packable daypack is handy as a second bag on longer trips.
- Laptop sleeve: protects electronics and speeds up security checks
- Clamshell opening: opens like a suitcase for easy access
- Hidden pockets: keep passport and wallet close to your back
- Lockable zippers: a small deterrent in crowded places
- Luggage pass-through: slips over a rolling suitcase handle
- Packable design: folds into its own pocket inside your main bag
If you use one bag for everything, compare it carefully with larger options. Our guides on how to choose a travel backpack and how to compare travel backpacks explain the trade-offs between daypacks and bigger travel packs. If you are deciding how to travel overall, see carry-on backpack vs rolling suitcase.
What materials and water resistance should a daypack have?
Daypacks are usually made from nylon or polyester fabrics with a water-resistant coating. Heavier, higher denier fabrics are generally tougher but add weight, while lighter fabrics save weight but can wear faster. Few daypacks are fully waterproof, so a rain cover or waterproof liner bag is the most reliable way to keep gear dry in heavy rain.
- Denier: a measure of fiber thickness; higher usually means tougher
- Ripstop weave: a grid pattern that helps stop small tears spreading
- Coatings: improve water resistance but wear over time
- Seams and zippers: water usually gets in through these first
- Liners: a dry bag or liner keeps the essentials dry whatever the fabric
Tip: Keep a lightweight dry bag inside your daypack for a warm layer, phone and first aid kit. It protects the items that matter most if you get caught in a storm.
Top loader or panel loader: which is better?
A top-loading daypack opens from the top, often with a drawstring and lid, and is simple, light and stable. A panel-loading daypack opens with a large zip around the front, making it easier to find items without unpacking everything. Top loaders suit hikers carrying bulky layers, while panel loaders suit travel and city use.
| Style | Pros | Cons |
|---|---|---|
| Top loader | Simple, light, fewer zippers to fail | Harder to reach items at the bottom |
| Panel loader | Easy access and organization | More zippers, often slightly heavier |
| Hybrid | Top access plus side or front zip | More complex design |
How do you care for a daypack so it lasts?
To care for a daypack, empty it after every use, shake out dirt and crumbs, and let it air dry fully before storing it. Clean it by hand with mild soap and lukewarm water when it gets dirty, and avoid washing machines and dryers, which can damage coatings, foam and buckles. Store it somewhere cool and dry.
- Empty every pocket, including hip belt and lid pockets.
- Brush or shake out sand, dirt and food crumbs.
- Rinse a hydration bladder and leave it open to dry.
- Spot clean marks with a soft brush and mild soap.
- Hang the pack upside down to dry, out of direct sun.
- Check zippers, buckles and seams, and repair small issues early.
Small problems like a sticking zipper or a loose strap are much easier to fix before they fail on the trail. Many outdoor shops offer repairs, and some brands provide replacement buckles and parts.
What are common mistakes when choosing a daypack?
Common mistakes when choosing a daypack are buying one that is too small for layers and water, choosing one that does not fit your torso, ignoring the hip belt on heavier loads, and picking a pack with features you will never use. Another frequent mistake is testing a pack empty in the store, which hides fit and comfort problems.
- Choosing purely by capacity without checking fit
- Testing the pack empty rather than loaded
- Buying the lightest pack when you carry heavy loads
- Forgetting where your water bottle will go
- Picking a travel pack with no hip belt for long walking days
- Buying a pack too large and filling it with items you do not need
Once you have narrowed your choice, the next step is getting the fit right on the trail. Read our guide on how to fit a hiking backpack before your first long day out.
Frequently asked questions
Is a 20 liter daypack big enough?
A 20 liter daypack is big enough for many day hikes and city days, with room for water, snacks, a light jacket and small essentials. It can feel tight in cold weather, when you carry bulky layers, or when carrying extras for children. If you hike often in changing weather, a slightly larger pack gives more flexibility.
Can you use a daypack as a carry-on?
Many daypacks work as a personal item or carry-on, especially smaller ones with a slim profile. Check your airline’s size limits, since they vary between airlines and fare types. A soft daypack is easier to fit under a seat than a rigid bag. Avoid overstuffing it, which can push it beyond size limits.
Should a daypack have a hydration sleeve?
A hydration sleeve is useful if you prefer drinking from a water bladder, since it lets you sip often without stopping. If you prefer bottles, side pockets you can reach while walking matter more. Many hiking daypacks include both. For city and travel use, a hydration sleeve is rarely needed and often doubles as a laptop or document sleeve.
How do you know if a daypack fits?
A daypack fits when it sits close to your back, the shoulder straps wrap smoothly without gaps or pinching, and the hip belt rests on your hip bones. The weight should feel balanced and stable when you walk, bend or climb stairs. Test it loaded with your usual gear, not empty, for an accurate sense of comfort.
Featured photo: rifasalipbi via Openverse (CC0).
