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How to buy a backpack


In the same way a pair of too-tight hiking boots can ruin your day on the trail, an ill-fitting backpack can easily turn your fun trek into a nightmare march. But it doesn’t have to be that way.

Backpacks come in many different shapes and sizes with tons of adjustability to fit just about any type of backpacker. The trick is finding the right pack for your body and the type of backpacking you have planned.

Your Gear Guy is here to help get you on the trail and easily shouldering that load.


To pick a pack that fits you correctly, first measure your torso length. Have a parent use a soft seamstress tape to measure the distance from the base of your neck straight down to your hipbone. Now find a pack that fits that sizing. Most youth backpacks have adjustable harnesses that accommodate a range of torso lengths.


The next measurement you need is your waist size. About 70 to 80 percent of the weight of your pack will be supported by your hips, so getting a hip belt that fits is key. Most hip belts offer a lot of adjustment, and some packs provide removable/swappable hip belts so you can size appropriately.

Deuter Fox 40 and Outdoor Products Dragonfly

Deuter Fox 40: ($109, Capacity: 40 liters/2,440 cu. in. Weight: 2 lbs. 14 oz. Adjusts to fit torso range of 11″-18″. The Fox 30 ($99) fits smaller guys. Outdoor Products Dragonfly External Frame Pack: ($67, Capacity: 45 liters/2,780; Weight: 3 lbs. 10 oz. Adjusts to fit torso range of 15″-18″.


There are two basic types of backpacks: External frame packs use a metal framework on the outside to support the load, while internal frame packs have their support structure hidden inside the pack like a skeleton.

Internal frame packs are more formfitting, bringing the load closer to your body for more stability and better performance on tight trails.

External frame packs are cheaper and provide better airflow between your body and the pack, while also offering more flexibility for packing bulky items.

When choosing between internal and external frame packs, make sure to consider the size of your sleeping bag. You might buy an internal frame backpack only to get home and realize there’s no way your sleeping bag will fit inside. If you have a lightweight, compressible sleeping bag, it should fit well in most internal packs, but if you have a big, bulky sleeping bag and won’t be getting a new one anytime soon, consider an external frame pack. It’ll give you plenty of room for strapping on a large sleeping bag.

Gregory Wanter 50 and Kelty Yukon 48

Gregory Wander 50: ($179, Capacity: 50 liters/3,051 cu. in. Weight: 3 lbs. 6 oz. Adjusts to fit torso range of 13″-18″. The Wander 70 ($199) fits larger guys. Kelty Yukon 48: ($170, Capacity: 48 liters/2,900 cu. in. Weight: 4 lbs. 13 oz. Adjusts to fit torso range of 13″-19″.


When it comes to backpacks, bigger is not always better. The amount of gear a pack can hold is measured in either liters or cubic inches. Your pack’s carrying capacity should mirror the type of trip you’re planning, whether it’s a simple overnighter, a full-on seven-day backpacking trip or something in between.

An internal frame pack with a capacity of about 40 to 60 liters would be a versatile size for most guys and perfect for a multiday trip. Of course, the smaller you are, the smaller the bag you should carry, so a 35- to 50-liter pack might be fine for you. You can also get by with a lower-capacity external frame pack since there’s lots of extra space to strap on a sleeping bag and pad.

Remember, just because you have space left over doesn’t mean you should fill your pack to the brim. Keep your load within 20 to 30 percent of your bodyweight. Carry just the essentials and your pack will be much lighter, you’ll use less energy getting down the trail and you’ll probably have a lot more fun, too!


They’re nice but not necessary. Comfort and fit are most important. Beyond that, look for a pack with compression straps that help keep your load from flopping around when the pack isn’t filled up. Some packs are top-loading only while others have side zips that let you access your stuff from several places. You’ll also find bells and whistles like built-in sleeves for hydration packs and lots of exterior organization pockets for easy access to what you need on the trail.


Ask around to see if friends have a backpack you can borrow. This will help you get a feel for what type of pack you want to buy and how it should fit. Some outdoor shops even rent backpacks, so you can try before you buy.

Osprey ACE 38 and Mountainsmith Youth Pursuit

Osprey ACE 38: ($140, Capacity: 38 liters/2,319 cu. in. Weight: 2 lbs. 6 oz. Adjusts to fit torso range of 11″-15″. The ACE 50 ($160) fits larger guys. Mountainsmith Youth Pursuit: ($140, Capacity: 45 liters/2,746 cu. in. Weight: 3 lbs. 6 oz. Adjusts to fit torso range of 13″-17″.


Before you go pack shopping, set a budget. Sure, you’ll see lots of tricked-out big brand-name backpacks in the $400-plus range, but you certainly don’t need to spend that much. The $150-$200 range will get you a nice pack that should last for several years or more.


Nothing beats a Scout shop or outdoor specialty store with knowledgeable sales people who can help with fit. Try on several packs, have them adjusted appropriately, then fill them up with gear and wear them around the shop for 15 to 20 minutes. The key is to simulate the kind of weight you’ll be carrying. So fill up the pack with 20 to 30 pounds of tents and climbing ropes from the store or bring your own gear. While buying online can save you some cash, you won’t be able to try out the pack before you buy it.

L.L. Bean Youth White Mountain Pack

L.L. Bean Youth White Mountain Pack: ($159, Capacity: 50 liters/3,051 cu. in. Weight: 4 lbs. 11 oz. Adjusts to fit torso range of 14″-16″.

REI Passage 65

REI Passage 65: ($159, Capacity: 65 liters/3,967 cu. in. Weight: 4 lbs. 4 oz. Adjusts to fit torso range of 15″-19″. The Passage 38 ($100) fits smaller guys.

All prices are MSRP — manufacturer’s suggested retail price. You can often find better deals in stores or online.

43 Comments on How to buy a backpack

  1. Which is better the REI Passage 65 or the LL-Bean White Mountain Pack Youth?Please respond soon!!!!!!!

  2. ultra-light master // July 7, 2011 at 7:45 pm // Reply

    like smitty says, the murmur is the best

  3. Kelty makes good externals. I like externals because there are more pockets and room to lash on a bag or mat on the frame. Happy backpacking everyone.

  4. Gossamer gear murmur. The best. Only 8oz. Uses sleeping pad as frame

  5. anybody have recomendations on a cheap pack for weekend campouts

    • Try a used military duffel bag with a plastic liner; a great general purpose bag if you’re not hiking a long way. Also one of the best canoe bags for the price. We just bought 3 for the Troop at $18.00 each. Liners were $3.00. They’ll last you a life time if you take care of them.

  6. The S.S. SCOUT! // February 26, 2011 at 11:30 am // Reply

    I recommend looking for one at Dick’s it will be a good bit of money but it will be worth it.(The highest i’ve seen is aboout $99.00 lowest is about twenty to thirty)

    • Yankees Rule!! // May 1, 2011 at 8:45 am // Reply

      actually, i’ve seen Dick’s sporting goods’ packs range from $40.00 to $199.99.

  7. xtreme kayaker // February 21, 2011 at 4:08 pm // Reply

    i usually use a hikers backpack with a sleeping bag on top

  8. Firstclasshiker509 // February 9, 2011 at 8:17 pm // Reply

    I use an internal frame pack wighs 5lbs. but supports really well with 30+lbs!!

  9. TheProfessor // February 8, 2011 at 8:42 am // Reply

    I’ve always used a external. Mine has the composite frame that has some give and flex. Very comfortable and breathes well in the summer. In my 30+ years of hiking, the externals give you more flexibility as to gear placement. They have more pockets and the frame to strap on your gear. The newer (last 15yrs) styles of internals have made much progress with compartments and pockets, but still suffer. I find it to be a real inconvenience to unpack most of my pack to get that piece of gear that I may need out. Internals have a better center of gravity and tend to have more adjustments for comfort, but will always be hotter to carry.

    • TheProfessor // February 8, 2011 at 9:00 am // Reply

      One more thought. With my external frame, I attached a water bottle holder (like the ones used on a bicycle) to the back side of my frame near the bottom. My water is always a few inches away which helps you drink more and stay hydrated.

    • Yankees Rule!! // February 28, 2011 at 8:06 am // Reply

      I just recently crossed over from a cub scout to a boy scout, and as soon as possible, my dad and i went to go look for a backpack. Since i am kind of small for my age i got a small external frame as well. i went on one camping trip already, and i think i over packed. alot of my friends got internal frames. and they seemed a lot less heavy, but our SPL said that external frames were the best. would you think, if i had a lot of gear, would need an internal frame?

  10. Osprey kestrel 48 liter is the best but not inexpensive last along time and weighs only 2 pounds

  11. i have a hi-tech pack and it is nice

  12. The Osprey Kestrel 58 is a great pack!! I’ve used it in just about every season and any trek. It is a little on the pricey side for me, since I try to find the best stuff for the lowest price, but still it is an awesome pack. I have never been ( and probably never will be) dissatisfied with this pack. Good work Osprey!

  13. I have a military pack also;] it is awsome. I love hiking

  14. i have a army surplus backpack and it is awesome

  15. Mountiansmith Scout external frames lack external pockets but make up for it in the HUGE 55 liter main pocket. it has straps for your sleeping bag and pad and a great fit

  16. i like the kelty trekker 3950 external frame backpack

  17. ygfreigritughytiuh // October 9, 2010 at 9:12 pm // Reply

    my camel pack makes the water nasty after a few hours how do i stop it.

  18. good tips, trailrat

  19. lightweight gu-ru // July 13, 2010 at 5:51 pm // Reply

    Get the Osprey Ace 48. AMAZING!!!!! I have it and it is awesome. It has good ventilation for your back in hot conditions and verrrrry comfortable.

  20. what are those solar things that you put on the backpacks. how much do they usauly cost and are they worth it. what kind of things can get power from them and does it power them well.

  21. external frams hurt my back.

    • off topic but what are those backpack solar energy things and are they worth buying and how much money and do they have ones with different plugs to charge diffdrent things.

  22. Ranger Danger // May 3, 2010 at 8:20 pm // Reply

    Try thrift shopping.. I bought a perfict size packpack for just 5 bucks and now I’m glad I did. The pack has no bells and whistles but it gets the job done!!

    • GANDALFRULES // June 1, 2010 at 8:51 am // Reply

      I bought a pack at Sams Club auction for 20 bucks, swiss gear really nice back pack with all the bells and whistles.

    • i have a 48 liter backpack from an army surplus shop for under 50 bucks water proof and very durable

  23. get up and go // April 24, 2010 at 9:17 am // Reply

    This may sound odd, but I highly recommend a pack without a frame.
    They may not have as much room as one with a frame, but they are loads more comfortable, and the
    packs them selfs are lighter too!

  24. Never buy a backpack over the internet! If you are going to get a pack, try to find a store and try it out. Some outdoor stores have a specialist to help you choose a pack, without trying to advertise to you. Those guys can help you find the right pack that fits you and how you are going to pack. If you can, ask if they have a weight or something and put it in the pack, then walk around in the store, try it out!

  25. I have two packs for different backpacking. For scouting trips I use a Teton Sports Scout 3400 cu. in. It is good for the simple 2 to 4 day trips. For longer trips, I use a Deuter 5500 cu. in. pack I bought from the NOLS base in Lander, WY. Both packs are great for packing and cheap. The Teton Sports pack I bought from Sportsman’s Warehouse for $50!!! It’s not hard to find a good pack at a reasonable price.

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