How Do I Know What Backpacking Bag to Get? A Comprehensive Guide for American Adventurers

So, you're bitten by the backpacking bug. Awesome! Hitting the trail with everything you need strapped to your back is an incredibly rewarding experience. But before you can conquer those mountain peaks or explore those remote canyons, you need the right pack. And let's be honest, staring at aisles packed with backpacks can be downright overwhelming. How do you know what backpacking bag to get?

Don't sweat it! This guide is here to break down the essential factors that will help you choose the perfect backpacking pack for your adventures. We'll get specific, so you can feel confident when you make your purchase.

1. Understanding Backpack Capacity: The Liters You Need

This is arguably the most crucial factor. Backpack capacity is measured in liters (L), and it dictates how much gear you can carry. Think of it like this: a bigger trip requires more stuff, thus a bigger pack.

Day Hikes (1-2 Nights):

Capacity: 30-50 Liters
Details: These are your weekend warrior packs. Perfect for a quick overnight trip or a long day hike where you might be carrying extra layers, food, and maybe a small tent. You won't need to pack the kitchen sink here.

Multi-Day Trips (2-4 Nights):

Capacity: 50-70 Liters
Details: This is the sweet spot for most backpackers. If you're planning on spending a few nights out, you'll need room for more food, a warmer sleeping bag, and potentially more clothing options.

Extended Trips (5+ Nights) or Winter Backpacking:

Capacity: 70+ Liters
Details: For serious expeditions, thru-hiking, or venturing out in colder months when bulky gear is a must, you'll need a larger pack. Be mindful of overpacking with these larger capacities – more space doesn't always mean you *should* fill it!

Pro Tip: When in doubt, lean towards a slightly larger pack. It's better to have a little extra space than to be struggling to strap everything to the outside of your pack.

2. Fit is King: How to Find a Pack That Feels Like an Extension of You

A poorly fitting pack will turn your dream hike into a miserable ordeal of chafing, pressure points, and back pain. Proper fit is non-negotiable. Here's what to look for:

Torso Length: The Most Important Measurement

How to Measure: This isn't your height, but the distance from the C7 vertebra (the bony bump at the base of your neck) down to your iliac crest (the top of your hip bone). You can have a friend help you with a flexible measuring tape.
Why it Matters: Backpacks are designed with adjustable torso lengths. Getting this right ensures the hip belt sits comfortably on your hips, and the shoulder straps are positioned correctly to distribute weight.
Pack Sizing: Most reputable brands offer their packs in different torso sizes (e.g., Small, Medium, Large) or have an adjustable torso system.

Hip Belt: The Real Weight Bearer

Details: The hip belt should comfortably cradle your hip bones. It's designed to carry about 80% of the pack's weight, so it needs to be snug but not constricting.
Padding and Shape: Look for well-padded hip belts that contour to your body.

Shoulder Straps: For Balance and Comfort

Details: These straps should curve smoothly over your shoulders without digging in. They help stabilize the load and prevent the pack from pulling backward.
Load Lifters: These small straps connect the top of the shoulder straps to the top of the pack frame. Tightening them pulls the weight closer to your body, improving balance and taking pressure off your shoulders.

Sternum Strap: The Finishing Touch

Details: This strap connects the shoulder straps across your chest. It helps keep the shoulder straps from sliding outwards and adds a bit of stability. Adjust it so it's comfortable, not tight.

Actionable Advice: When trying on packs, load them up with at least 15-20 pounds of weight. Walk around the store for a good 10-15 minutes. Pay attention to any pressure points or discomfort.

3. Pack Features: The Bells and Whistles You Might Actually Need

Beyond capacity and fit, specific features can enhance your backpacking experience. Consider what's important for your type of travel:

Frame Type: Internal vs. External (Mostly Internal These Days)

Internal Frame: This is the standard for modern backpacking packs. The frame is integrated into the pack's design, providing support without being externally visible. They offer a closer fit and better weight distribution.
External Frame: Less common now, these packs have a visible frame that the bag attaches to. They can be good for carrying very bulky or irregularly shaped loads, but they tend to be heavier and less agile.

Access Points: Top-Loading vs. Panel-Loading

Top-Loading: The traditional design. You stuff your gear in from the top and cinch it shut. Usually has a lid or brain that can be adjusted for extra storage.
Panel-Loading (Front Access): These packs have a U-shaped zipper that allows you to open the front of the pack like a suitcase. This makes it much easier to access gear buried deep inside without having to unpack everything.

Pockets and Organization:

Lid Pocket: Great for quick-access items like snacks, maps, or a headlamp.
Front Stretch Pocket: Ideal for stashing a rain jacket, trowel, or wet gear.
Side Water Bottle Pockets: Essential for easy hydration access.
Hip Belt Pockets: Perfect for your phone, lip balm, or a small camera.
Internal Pockets: Some packs have dedicated pockets for hydration reservoirs or smaller organizational needs.

Hydration Reservoir Compatibility:

Details: Most modern packs have an internal sleeve and a port for a hydration reservoir (like a CamelBak or Platypus). This is a game-changer for staying hydrated on the go.

Attachment Points:

Details: Loops and straps for attaching trekking poles, ice axes, sleeping pads, or even a tent to the outside of your pack.

4. Weight: The Lighter, The Better (Within Reason)

The weight of your backpack itself is a factor. While a super lightweight pack might be tempting, ensure it doesn't compromise durability or load-carrying comfort. Aim for a balance. Ultralight packs are becoming increasingly popular, but they often come with a higher price tag and may require a more minimalist packing approach.

5. Budget: Investing in Your Comfort

Backpacks can range from under $100 to over $400. While it's tempting to go for the cheapest option, a good quality pack is an investment in your comfort and the enjoyment of your trip. You don't need the absolute top-of-the-line for your first few trips, but avoid the absolute bottom of the barrel. Look for sales and consider last year's models, which can offer significant savings.

6. Trying Before Buying: The Golden Rule

As mentioned, trying on packs is crucial. Visit your local outdoor retailer (REI is a great option in the US) and work with a knowledgeable salesperson. They can help you measure your torso, adjust the pack's suspension system, and offer personalized recommendations. Don't be shy – ask questions and spend time in the fitting room!

Consider Your Trip Type:

Car Camping vs. Backpacking: If you're mostly car camping, you can get away with a simpler, less feature-rich pack. Backpacking demands a pack designed for serious load-carrying and comfort over long distances.
Seasonality: Winter gear is bulkier, so you'll generally need a larger capacity pack for cold-weather trips.
Terrain: If you anticipate a lot of scrambling or bushwhacking, a sleeker, more streamlined pack might be better.

By considering these factors – capacity, fit, features, weight, budget, and trying before you buy – you'll be well on your way to selecting the perfect backpacking bag that will be your trusty companion on countless adventures. Happy trails!

Frequently Asked Questions (FAQ)

How do I know if a backpack fits my torso?

To determine your torso length, have a friend find the C7 vertebra (the bony bump at the base of your neck) and your iliac crest (the top of your hip bone). Measure the distance between these two points with a flexible tape measure. Most backpack manufacturers provide a size chart based on torso length ranges. Trying the pack on with weight in it is the best way to confirm the fit.

Why is the hip belt so important?

The hip belt is designed to carry the majority of your pack's weight – typically around 80%. A properly fitted hip belt rests on your iliac crest and transfers the load from your shoulders and back to your stronger leg muscles. This significantly reduces fatigue and prevents discomfort on longer hikes.

How much weight should I put in a backpack when trying it on?

When trying on a backpacking pack at a store, aim to load it with at least 15-20 pounds of weight. This can be done with sandbags, sleeping bags, or other gear provided by the store. This weight will give you a realistic feel for how the pack will perform on the trail and help you identify any pressure points or fit issues.

When do I need a larger backpack (70L+)?

You'll typically need a backpack of 70 liters or more for extended trips lasting five nights or longer. This size is also essential for winter backpacking when you'll need to carry bulkier clothing, a warmer sleeping bag, and potentially specialized gear like snowshoes or an ice axe. It's also suitable for thru-hiking where you might be carrying more provisions between resupply points.