How to Choose a Backpacking Backpack

Table of Contents

1. Introduction
2. Understanding Pack Volume and Trip Length
3. Mastering the Fit: Torso Length and Hip Sizing
4. Suspension and Frame Types
5. Essential Features to Look For
6. Gender-Specific Considerations
7. How to Test and Adjust Your Pack
8. Weight vs. Durability: The Trade-off
9. Conclusion
10. FAQ

Introduction

Every experienced hiker has a story about the "death march"—that one trip where every mile felt like five because their gear was working against them. Usually, the culprit isn't the terrain or the weather; it’s a poorly fitted or incorrectly sized backpack. At BattlBox, we have spent years testing gear in the field, and if you want expert-curated gear delivered monthly, choose your BattlBox subscription is the next step. This guide covers how to determine the right volume for your trip length, how to measure your body for a custom-grade fit, and which features actually matter when you’re deep in the backcountry. Choosing the right pack is a balance of capacity, comfort, and weight distribution that transforms a heavy load into a manageable extension of your body.

Quick Answer: To choose a backpacking backpack, first determine the volume you need based on trip length (typically 50–70 liters for a weekend). Next, measure your torso length from your C7 vertebra to your iliac crest to ensure a proper fit. Finally, prioritize a pack with a robust hip belt, as it should carry 80% of the total weight.

Understanding Pack Volume and Trip Length

The first step in selecting a pack is deciding how much space you actually need. Backpack capacity is measured in liters, representing the total volume of the main compartment, pockets, and lid. If you buy a pack that is too small, you’ll end up strapping gear to the outside, which throws off your center of gravity. If it’s too large, you’ll be tempted to overpack, and the bag itself won’t compress correctly around a smaller load. If you want a deeper breakdown of sizing, how big of a pack you need for backpacking is a good place to start.

Overnight Trips (30–50 Liters)

For a single night in the woods, you can often get away with a smaller, lighter pack. These are designed for those who have refined their kit and use compact, modern gear. If you are packing a standard synthetic sleeping bag and a bulky two-person tent, you might find a 30-liter pack too tight. However, for "fast and light" enthusiasts, this range is the sweet spot. That kind of setup fits neatly with BattlBox’s Camping Collection.

Weekend Trips (50–70 Liters)

This is the most popular category for a reason. A 50- to 70-liter pack is versatile enough for a two-night trek or a four-day excursion if you are disciplined with your packing. This size allows room for the "Ten Essentials," a dedicated cooking system, and extra layers for cold evenings. When we curate gear for our Advanced and Pro subscriptions, we often look for items that fit perfectly within this volume range.

Extended Trips (70 Liters and Up)

When you are heading out for five days or more, volume requirements increase significantly. You aren't just carrying more gear; you are carrying more food and potentially more water. These packs are also necessary for winter backpacking, where bulky items like heavy down parkas, four-season tents, and extra fuel take up substantial real estate. For that kind of trip, something like the AquaPodKit Emergency Water Storage starts to make sense.

Key Takeaway: Don't buy a pack based on what you think you might do in three years; buy the pack that fits the gear you own right now for the trips you take most often.

Mastering the Fit: Torso Length and Hip Sizing

A common mistake is choosing a backpack based on your total height. In reality, your torso length is the only measurement that dictates how a pack will sit on your frame. A tall person can have a short torso, and a shorter person can have a long one. If the pack is too long for your torso, the weight will pull away from your shoulders; if it’s too short, it will cramp your movement and cause shoulder fatigue. For a step-by-step walkthrough, read how to measure torso length for backpacking.

Measuring Your Torso

To get an accurate measurement, you will need a flexible measuring tape and a friend to help.

1. Locate the C7 Vertebra: Tilt your head forward and feel for the bony bump at the base of your neck. This is the top of your torso measurement.
2. Find Your Iliac Crest: Put your hands on your hips so your index fingers point forward and your thumbs point toward your back. The "shelf" of bone your hands are resting on is the iliac crest.
3. The Measurement: Have your friend measure the distance along the curve of your spine from the C7 vertebra down to the imaginary line between your thumbs.

Most adult men fall between 17 and 21 inches. Manufacturers usually offer packs in Small, Medium, and Large, or provide an adjustable suspension system that allows you to slide the shoulder harness up or down to match your specific inch count. A real-world example is the Defcon 5 Backpack.

The Importance of the Hip Belt

The "hips carry the weight" is a mantra in the backpacking world for a reason. Roughly 75% to 80% of the pack’s weight should be supported by your iliac crest, not your shoulders. A proper hip belt should wrap comfortably around your hips, not your waist. If the belt is too high, it will squeeze your stomach; if it’s too low, it will chafe your legs as you walk.

Note: When trying on a pack, always load it with at least 15–20 pounds. An empty pack always feels comfortable in the store, but weight reveals the true nature of the suspension and padding.

Suspension and Frame Types

The frame is the skeleton of your backpack. It provides the structure necessary to transfer the weight from your back to your hips. While there are several variations, most modern packs fall into three categories.

Internal Frame Packs

The vast majority of backpacks sold today are internal frames. They utilize two aluminum or carbon fiber stays (or a plastic framesheet) hidden inside the back panel. These packs are designed to hug your body, keeping the load close to your center of gravity. This makes them ideal for technical trails, scrambling over rocks, or moving through dense brush where balance is critical. For a closer look at the options, see what to look for in a backpacking pack.

External Frame Packs

While they look "old school," external frame packs still have a dedicated following. The bag is attached to a visible metal frame that sits away from your back. This creates excellent airflow, preventing the dreaded "sweaty back" syndrome. External frames are also superior for hauling extremely heavy, irregular loads—like those found on hunting trips or long-distance expeditions where you are carrying 60+ pounds. That kind of rugged carry pairs well with BattlBox’s Bushcraft Collection.

Frameless Packs

Usually reserved for the ultralight community, frameless packs rely on the user’s gear (like a folded foam sleeping pad) to provide structure. They are incredibly light but generally shouldn't be used for loads exceeding 20–25 pounds. If you are just starting out, we recommend sticking with an internal frame until your gear list is dialed in and lightweight.

Bottom line: For most hikers, an internal frame pack offers the best balance of weight distribution, stability, and comfort on varied terrain.

Essential Features to Look For

Modern packs are loaded with features, but some are more functional than others. When you are looking at different models, how to buy a backpacking backpack is the right checklist to keep in mind. Prioritize these components that improve your efficiency and comfort on the trail.

Load Lifters and Sternum Straps

Load lifters are the small straps located on top of the shoulder harness. When pulled, they bring the top of the pack closer to your body, preventing it from leaning backward. Ideally, these straps should sit at a 45-degree angle from the pack to your shoulders. The sternum strap connects the two shoulder straps across your chest, preventing them from sliding outward and keeping the load centered.

Access Points

How you get into your gear matters.

• Top-Loading: The most common design. It’s lightweight and water-resistant but requires you to dig through everything to reach the bottom.
• Front-Loading (Panel Access): Features a U-shaped zipper that lets the pack open like a suitcase. This is great for organization but adds weight and potential failure points (zippers).
• Sleeping Bag Compartment: A zippered opening at the very bottom of the pack. It’s incredibly convenient for stowing your bulky sleeping bag without unpacking the rest of your kit.

Pockets and Attachments

• Hip Belt Pockets: These are essential for items you need on the move, such as snacks, a small compact EDC multitool, or a compass.
• Shove-it Pocket: A large, stretchy mesh pocket on the front of the pack. It’s the perfect place to dry out a wet rain shell or stash a map.
• Hydration Sleeve: An internal pocket designed to hold a water bladder. Make sure the pack has a port for the drinking tube to exit.
• Compression Straps: These allow you to "cinch down" the pack when it isn't full, keeping the load from shifting while you walk.

Myth: A more expensive pack with more pockets is always better. Fact: Extra pockets add weight. Many professional backpackers prefer a simpler, lighter design and use internal "stuff sacks" or dry bags to organize their gear instead.

Gender-Specific Considerations

Many manufacturers offer men's, women's, and unisex fits. While anyone can wear any pack that fits their measurements, gender-specific designs address real anatomical differences.

Women’s packs typically feature:

• Contoured Shoulder Straps: These are often curved differently to sit comfortably around the chest area.
• Shorter Torso Ranges: Since women often have shorter torsos relative to their height, the frames are scaled accordingly.
• Angled Hip Belts: Women’s hips are often shaped differently than men’s, so the padding on the hip belt is canted to provide better surface contact and weight distribution.

If you are a man with a narrower frame or a woman with a longer torso, don't be afraid to try "the other" version. The goal is the fit, not the label.

How to Test and Adjust Your Pack

Once you have selected a pack and brought it home, you need to know how to wear it. A $400 pack will feel like a $20 pack if it isn't adjusted in the right order. Follow these steps to ensure you are getting the most out of the suspension system.

Step 1: Loosen all straps. Before putting the pack on, loosen the shoulder straps, hip belt, load lifters, and sternum strap. This allows the pack to "reset" to your body every time you put it on.

Step 2: Position the hip belt. Put the pack on and buckle the hip belt. Position it so the padding covers the top of your hip bones (the iliac crest). Tighten it firmly; this is where the weight should live.

Step 3: Adjust the shoulder straps. Pull the shoulder strap webbing down and back. They should wrap snugly over your shoulders but should not be carrying the majority of the weight. You should still be able to move your arms freely.

Step 4: Engage the load lifters. Pull the load lifter straps until the top of the pack moves toward your head. You should feel the weight shift forward, stabilizing the bag against your upper back.

Step 5: Buckle the sternum strap. Connect the sternum strap and tighten it until it is snug but doesn't restrict your breathing. It should sit about an inch below your collarbones.

Important: If you feel a gap between your shoulders and the straps, or if the pack is pulling you backward even after adjusting, the torso length is likely too long for you.

Weight vs. Durability: The Trade-off

When choosing a pack, you will notice a massive range in weight. Some "ultralight" 60-liter packs weigh under two pounds, while "heavy-duty" expedition packs can weigh over six pounds empty.

Lighter packs achieve their weight savings by using thinner fabrics (like DCF or low-denier nylon) and minimal padding. These are excellent if the rest of your gear is also lightweight. However, if you are carrying 40 pounds of traditional camping gear in a two-pound pack, the thin straps will dig into your shoulders and the fabric may tear under the stress.

Conversely, a heavier pack uses thicker, abrasion-resistant materials and plush foam padding. These are much more durable for bushcraft or off-trail travel where you might be scraping against rocks and thorns. A compact backup fire starter is a smart addition when the rest of your kit is built for reliability. We often include rugged, high-denier gear in our Pro Plus boxes because we know our community values equipment that can withstand real-world abuse.

Conclusion

Choosing a backpacking backpack is one of the most personal gear decisions you will make. It requires an honest assessment of your hiking style, a clear understanding of your body’s measurements, and a focus on the features that actually enhance your time on the trail. By prioritizing torso fit and weight distribution to the hips, you ensure that your focus remains on the scenery and the challenge of the hike, rather than the ache in your shoulders.

Our mission at BattlBox is to provide you with the expert-curated gear and knowledge you need to step into the wild with confidence. Whether you are building a survival kit or planning a week-long trek, the right pack is the foundation of your self-reliance. Once you have your sizing and volume dialed in, you are ready to explore the backcountry with a load that feels like a part of you, not a burden. If you want to round out that kit, the Emergency / Disaster Preparedness Collection is a strong next stop.

• Measure your torso accurately from C7 to iliac crest.
• Choose volume based on your current gear and trip length.
• Prioritize hip belt comfort and load transfer.
• Order your adjustments: Hips, then shoulders, then lifters.

Key Takeaway: The best backpack in the world is the one that fits your specific torso length and carries your specific gear list comfortably. Everything else is secondary.

For more gear to fill your new pack and to join a community of outdoor enthusiasts, consider exploring Backpacking the BattlBox Way to get a clearer picture of what belongs in a well-built trail kit.

FAQ

How do I know if my backpack torso length is correct?

When the hip belt is centered over your hip bones, the shoulder straps should wrap smoothly over your shoulders with no gaps. If there is a space between your shoulders and the strap, the torso is too long; if the straps start several inches below your shoulders, the torso is too short.

Can I use a 65-liter pack for a day hike?

Technically yes, but it is not ideal. A large pack will be heavier than necessary and won't stabilize a small load well, causing the gear inside to shift and throw off your balance. Most hikers prefer a dedicated 18-30 liter daypack for short trips.

What is the difference between a backpacking pack and a rucksack?

In modern terms, a "backpacking pack" usually refers to a bag with an internal frame and advanced suspension designed for long distances. A "rucksack" often implies a more traditional, rugged, top-loading bag that may or may not have a sophisticated frame, often used for military or heavy-load training.

How much weight should I carry in my backpack?

A general rule of thumb is that a loaded backpack should not exceed 20% of your total body weight. For example, a 200-pound person should aim for a pack weight of 40 pounds or less. Experienced hikers with well-fitted packs can sometimes carry more, but staying within this limit helps prevent injury and fatigue.