How to Choose the Right Internal Frame Backpack for Your Backpacking Trip

Whether you’re planning a weekend escape or a multi-day wilderness adventure, your backpack is your most important piece of gear. A well-fitted internal frame pack can make or break your trip—so it’s worth taking the time to choose the right one.

Here’s a step-by-step guide to help you pick the best internal frame backpack for your needs:

1. Determine the Trip Length and Gear Volume

Backpacks are typically sized by volume in liters. Here’s a general guideline:

  • 1–3 nights: 35–50 liters

  • 3–5 nights: 50–70 liters

  • 5+ nights: 70+ liters

If you’re packing ultralight, you can size down. If you’re carrying bulky gear, or gear for others (like kids), size up.

2. Understand the Internal Frame Advantage

Internal frame packs are designed to hug your back and keep the load close to your center of gravity—great for uneven terrain and better balance. They’re different from external frame packs, which are bulkier and better for trail-only travel with heavy, rigid loads.

Choose an internal frame pack if your trip includes:

  • Steep or technical terrain

  • Off-trail travel

  • A desire for a sleeker, more ergonomic fit

3. Get the Right Torso Length and Hip Belt Fit

Backpacks are not one-size-fits-all. To find your fit:

  • Measure your torso length: From the base of your neck (C7 vertebra) to the top of your hip bones (iliac crest).

  • Check pack sizing: Most brands offer sizes like S/M, M/L, or numerical ranges.

  • Adjust the hip belt: Your hips—not your shoulders—should carry most of the weight. Make sure the hip belt wraps securely around your hip bones, not your waist.

Stop by one of our locations to try the pack on first. Load them with weight to simulate real-world use.

4. Consider Key Features and Access

Think about how you like to organize your gear and access it:

  • Top-loading vs. panel access: Top-loading is common, but panel or U-zip designs can offer easier access to gear.

  • Pockets: Look for hip belt pockets, stretch mesh side pockets, and exterior stash zones.

  • Hydration compatibility: Most internal frame packs offer a sleeve for a water reservoir.

  • Attachment points: Consider trekking pole holders, ice axe loops, or daisy chains for strapping gear externally.

5. Choose the Right Suspension and Comfort System

A pack’s suspension system determines how it handles weight. Look for:

  • Padded shoulder straps and hip belts

  • Ventilated back panels for airflow

  • Load lifter straps to pull weight off your shoulders

  • Adjustable sternum straps for added balance

If the pack doesn’t feel stable or comfortable with a loaded setup, try another model.

6. Match the Pack to Your Environment

Different trips call for different features:

  • Hot, dry climates: Prioritize ventilation and hydration storage.

  • Wet environments: Look for integrated rain covers or waterproof fabrics.

  • Cold conditions: Consider a pack that can hold larger sleeping bags, bear canisters, or winter gear.

7. Don’t Forget to Try It On—Packed!

The best test is loading the pack up with 20–30 pounds and walking around. Does it rub anywhere? Sag too low? Make your shoulders sore?

Trying it in-store (ideally at a your closest Massey’s location) gives you the chance to find the pack that really works for your body.

Final Tip: Invest in Fit Over Features

A fancy pack with every bell and whistle won’t help if it doesn’t fit you properly. Prioritize comfort, fit, and load balance over anything else.