Why Backpack Choice Matters More Than You Think
A poorly fitted or wrong-sized backpack is one of the most common causes of discomfort on the trail. Too large and you'll overpack; too small and you'll leave essential gear behind. Understanding how to evaluate a backpack before you buy will save your back, your shoulders, and your trip.
Step 1: Determine the Right Capacity
Backpack volume is measured in liters. Choosing the right volume depends on trip length and your packing style:
| Trip Type | Recommended Capacity |
|---|---|
| Day hike | 10–25 liters |
| 1–2 night trip | 30–50 liters |
| 3–5 night trip | 50–65 liters |
| Extended expedition (6+ nights) | 65–80+ liters |
Keep in mind that ultralight packers can often do multi-day trips with smaller packs by using compact, lightweight gear.
Step 2: Get the Right Fit
Fit is the single most important factor. A backpack transfers weight to your hips (ideally 70–80% of the load) through the hip belt, with the shoulder straps providing stability rather than carrying the full load.
Torso Length vs. Height
Most manufacturers size packs by torso length, not overall height. To measure your torso length, find the bony prominence at the base of your neck (C7 vertebra) and measure down to the top of your hip bones (iliac crest). This measurement determines your pack size (typically XS/S/M/L).
Hip Belt Fit
The hip belt should wrap around the top of your hip bones, not your waist. When buckled, you should have about an inch of adjustment room on each side. If the belt only reaches the buckle on its last notch, you may need a wider hip belt size.
Step 3: Evaluate Key Features
Frame Type
- Internal frame: The most common type for backpacking. Keeps the load close to your body for better balance on uneven terrain.
- External frame: Better airflow and load-hauling capacity, but less agile on technical terrain. Good for heavy loads on established trails.
- Frameless: Used by ultralight hikers. Requires disciplined packing and is best for lighter loads under 20 lbs.
Suspension System
Look for padded, contoured shoulder straps, a load lifter strap (connects the top of the shoulder strap to the pack), and a sternum strap for lateral stability. Higher-end packs offer adjustable torso lengths and interchangeable hip belts.
Access Points
- Top-loading: Classic design, most durable and weather-resistant. Requires unpacking to reach buried items.
- Panel-loading: Opens like a suitcase for easy access. Less water-resistant but more convenient for organized packers.
- Hybrid: Combines top and panel access — a great all-around option.
Pockets and Organization
Consider: a hip belt pocket for snacks and a phone, side mesh pockets for water bottles, a top lid pocket for quick-access items, and a sleeping bag compartment at the base (useful but adds weight).
Step 4: Check Weight vs. Durability
Ultralight packs sacrifice durability for weight savings. A pack made from Dyneema or ultralight nylon might weigh under 1 lb but will cost significantly more and wear faster. Standard packs using 200–420D nylon offer a good balance of weight and durability for most backpackers.
Step 5: Try Before You Buy
If possible, visit an outdoor retailer and try on several packs with weight in them. Staff at specialty outdoor shops can help fit the pack to your body. If buying online, check the return policy so you can test it on a short hike before committing.
Bottom Line
A great backpack disappears on your back — you stop thinking about it and start thinking about the trail. Invest in fit first, features second, and brand last. The right pack for you is the one that carries your load comfortably over many miles.