Backpacks & Features 101

How do you choose the best backpack for your adventures?

We’ll break it down and keep it as simple as we can. There are many pack options available, making it especially confusing for beginners.

First, you’ll need to understand how to choose the backpack size (capacity) you need. This will vary based on activity (like climbing or fishing), length of trip (days), the weather and season of year, as well as personal needs. A pack that carries one person’s gear for a weekend may work for a more minimalist backpacker for a week or more.

Once you get comfortable with backpacking, chances are you’ll acquire several backpacks for different types and lengths of adventures.



An overnight hiking backpack is designed to accommodate enough gear and food for a light packer for one or two nights. Gear you’ll need to fit includes your sleeping setup (tent or hammock, sleeping bag, pad). A size of 35 liters or less is ideal for desert camping, perhaps without a tent, sleeping under the stars on a warm summer night. This size pack can also be used as an extended day pack.


A weekend backpack usually ranges from 35 to 50 liters and is big enough to carry a backpacking sleeping bag, small tent, and pad, as well as extra clothing and layers. Other things you’ll need to carry include a small stove, food and basic cookware, plus a water filter/purifier, first aid kit, and navigation tools. Depending on your packing skills you may also have room for luxury items like a lightweight chair, coffee press, or small camp lantern.


A light packer will have ample room for five nights or more with a multi-day backpack, which is typically at least a 50L backpack. These packs are designed to carry more food and cooking fuel than a weekend pack, as well as extra clothes and layers. Packs specifically for expedition or winter camping will be on the larger side (over 75 liters) to accommodate a warmer sleeping setup, mountaineering equipment, and first aid and survival gear. Look for a super burly suspension as well as ample straps and loops for gear attachment or hauling of the pack itself.


It’s extremely important that your pack fits correctly… that’s why it’s important to go to a shop like Great Miami Outfitters where the staff know how to give you the best fit. There are two main considerations: the size of the hip belt and the length of the suspension system. If your hip belt is too large, you will not be able to carry the load efficiently. Remember that most of the weight should rest on your hips, so that they can disperse the weight to your larger bones and muscles. All packs are going to have an adjustable hip belt, but some go further and offer interchangeable belts to get an even more dialed-in fit.

The same goes for the shoulder harness system. Packs are not sized by your height but the length of your back or, more specifically, torso. Sizing is not standardized between manufacturers, so it’s essential to get an accurate measurement. The measurement you are looking for is from your C7 vertebrae (the more prominent one at the bottom of your neck) down to your iliac crest (essentially, the line running between the tops of your hip bones). You will likely measure in the 16-23 inch range; look at a specific pack’s sizing charts based on that measurement. Many packs out there feature a suspension adjustment so you can get the fit just right.

Women-specific packs are not just for women; Several smaller men who take advantage of the features these can offer. These packs are going to be narrower and have shorter torso options; the shoulder straps are more contoured as well.


Once you’ve decided on the right choice from all the backpack sizes available, you’ll want to figure out what features are important to you. You’re going to pay more for extra features, but they may make your trip more enjoyable. Ultralight packs, as well as ones with an advanced suspension and/or ventilation to keep you cooler, generally cost a bit more.


Because the suspension systems of internal frame packs are smaller and use a variety of lightweight materials, internal frame packs tend to be lighter and lower profile than external frame packs. This lower profile makes them more functional in tight quarters such as overgrown trails. Because the load is carried closer to the body in a more compact configuration, your balance and mobility will be better. Off the trail, its more streamlined shape means that it’s going to be easier to transport in a car or plane than an external frame pack.

There are a number of features you can look for when shopping for a pack. Many will increase the cost of a pack, but greatly increase comfort and convenience.

Features to look for include:

Shoulder and Hip Belt Padding

You can expect to carry most of the weight of your pack on your hips—at least 75%, in fact. The heavier the pack you intend to carry, the more padding becomes a factor. For weekend and week-long packs, in particular, you want ample hip and shoulder padding. Consider these features and designs:

  • Some pack manufacturers offer hip belts that can be customized by heat molding, which can greatly increase comfort; however, this generally should be done at a certified dealer.
  • Pivoting hip belts can aid in comfort as well as increased balance in the suspension of the pack, because the pack won’t shift around as much as your hips move.
  • The use of mesh and lightweight foams can make a pack much more comfortable in hotter weather.
  • Hip-belts with accessory pockets make getting to cameras, snacks and other small necessities a breeze.


If you’re backpacking in warm weather, ventilation is very important. Materials like lightweight mesh, perforated foam and special framing systems keep much of the back panel away from your skin. Although it’s generally understood that this does not affect the overall performance of a pack, it can greatly increase your comfort.

External Attachments

This is a nice feature as it can add versatility to your pack. Loops, daisy chains, and bungees can increase capacity by enabling you to lash additional gear to the outside of your pack, or give you a way to expose items to sun and air, like solar-powered devices or a wet jacket. Compression straps will let you cinch your pack down to a smaller size when it is less full, so it doesn’t shift around unnecessarily.

Sleeping Bag Compartment, Multiple Access Points

Features to consider if you want to keep your gear more organized, since a lot of packs consist of one main compartment where everything goes. Multiple or larger access points to the main compartment (top, front, back, or side access) become important for longer trips, camping with kids, or through-hikes, as you can expect to be getting in and out of your pack more frequently and wanting to access individual items without unloading everything.

Keep in mind that the more ‘organization’ a pack has, the more it will usually cost; if you decide to go with a more minimalist option, you can always invest in pack organization items like stuff sacks, compression sacks, and dry sacks. These are also useable when you’re not on the trail as well.

Rain Cover

Some packs come with an integrated rain cover that tucks away, while other models have rain covers sold separately. If you anticipate frequent hikes in rainy conditions, it’s an important consideration.

Removable Lids

Many packs have lids (top flaps) that are not only good for holding small items you want to have easy access to, but that are also removable to use as a lumbar pack (or simply if you want to save weight). This feature is nice if you are setting up a base camp and planning to do day hiking from there, giving you a convenient way to carry a water bottle and other small items.

Hydration Compatibility

There are two ways to carry and access your water on the trail. Water reservoirs (bladders) make getting enough liquids really convenient. They range in capacity, generally averaging around 1 to 3 liters. If your pack is compatible, it will have a separate sleeve for this to slide into as well as a hook to keep the reservoir vertical. The shoulder harness will have a port and clip to keep the tubing and mouthpiece easily accessible. Water bottle pockets are nice, especially if you are not using a hydration system. The advantage of water bottles is that they are less prone to failure and much easier to fill with a water filter. Many people will use a combination of both.

Feel free to stop in the shop and get all of your pack questions answered. Try on different packs and get properly fitted by our pack-fitting specialists.

Opsrey Packs

Gregory Packs

Mystery Ranch Packs


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