Explorer 4000 Backpack





Incredible views and remote trails are just some of the rewards you’ll enjoy when you’re backpacking in the wilderness. The best backpack makes all the difference. And because backpacking can push you to your limits, you need gear that can keep up with you and your latest adventure.

So, we created the Explorer 4000. It’ll pack it all. You can organize your essentials with multiple pockets. There’s a sleeping bag compartment and compression straps to stabilize your load. Comfort features include a padded back panel that is channeled for optimal airflow, padded lumbar, waist and shoulder straps that help balance the load. Adjust the torso, waist, chest and shoulders to fit men, women and youth. The Explorer 4000 Internal Frame Backpack was designed with you in mind and is helping thousands of backpackers enjoy The Great Outdoors.


-Multi-position torso adjustments fit a wide range of body sizes
-Padded waist straps with wide locking hip straps
-Sturdy 600D ripstop and Oxford Canvas shell
-Front compression straps to secure sleeping bag, pad or tent
-Side and lower gear loops for long item storage
-Large side zippered pockets with weather-guard zippers
-Contoured, adjustable, padded shoulder straps
-Aluminum stays are easy to access for adjustment
-Separate sleeping bag compartment for easy sleeping bag access
-Hydration ready to 3-Liters
-Rainfly included
-Lifetime Warranty

Specs and Sizing

Primary Features

Capacity: 4000 Cubic Inches / 65 Liters
Hydration Capacity: 100 Ounces (3 Liters), Bladder Not Included
Pack Weight: 5 lbs.
Waist Belt: Adjustable 28" - 70"
Torso Length: Adjustable 19" - 23"


Shell: 600D Diamond Ripstop / 600D PU

Works Great With

Oasis 1100 Hydration Pack with Free 2-Liter Hydration Bladder

$44.99 View

LEEF Regular 20 Degree Ultralight Mummy Sleeping Bag

$79.99 View

Rock 1800 Backpack

$67.99 View

ALTOS-S 0 Ultralight Mummy Bag

$109.99 View

Customer Reviews

  • Rated 4.89 out of 5 based on 9 customer ratings
  • Brad L

    Great pack. Used it for a 2 week trip to Sweden & Denmark last year. Held all my stuff and comfortable to carry. The big pocket at the bottom is perfect for that extra pair of shoes. Bought a big, cheap duffel to cover it so the straps didn’t get caught in the airline baggage handling equipment. Worked perfect!

  • Mya Murphy

    Amazing bag!! I go camping and hiking quite a bit, and this bag has seen it all.. It has hit rocks, it has been through all sorts of terrain. I’ve never seen a bag so durable! I will definitely be getting more for all my outdoorsy friends.

  • Corey

    I absolutely love this pack I’ve used it for about 2 years and has never failed me even while volunteer in for the Pacific crest trail association using it to carry rocks that easily weighed a 100 pounds more than the backpack.. I love their customer service I’ll keep buying from them just because of that!! Keep up the great work both in your equipment AND customer service!!

  • Jennifer H.

    I think that the color choices are nice. I think that it has a lot of ways to organize. I like that it has added lumbar, waist and shoulder straps for comfort.

  • Randy L Shepard

    Great solid bag at an amazing price, takes a beating but holds up

  • Shaun Harris

    Love this bag! I’m hard on my gear and it has not let me down. I’ve carried this backpack on almost 800 miles of trail, through all kinds of rough terrain, on numerous trips and it’s held up wonderfully. It’s set up is easy to pack, allowing me to store and organize all of my equipment so it’s accessible when I need it.

    I’m also a big guy at 6’3” and 290lbs; the torso adjustments, chest and hip straps are perfect, allowing me to adjust the pack to my comfort, making long back country trips that much more enjoyable.

    You also, from my experience, cannot beat the cost of this amazing bag. It has outlasted all the high dollar packs I’ve purchased in the past…That, combined with the savings, is incredible and frees up cash I can use for more gear or to help fund more trips.

    In short, Teton Sports, is now my go to company for durable and affordable gear that I can use from the river bottoms to mountain tops with piece of mind. Thanks for the great product! This summer I’m going to try my hand at making hiking / gear videos and I’ll be sure to showcase this pack and anything else I buy from these guys. I can’t describe how happy I am with this pack in a short review.

  • Gene

    This pack is an unbeatable value. I’ve used my Explorer 4000 on at least four backpacking trips now, and it has held up almost perfectly. One thing I like is the zipper durability. I almost rated the pack five stars, due to its value — what you get for the investment — but I did note a couple of things: Despite zipper durability, the zipper to the bottom access can be tough to move. Also, while my pack’s torso adjustment was easy to do, the Velcro there began coming open on my second trip with the pack; fortunately, I was able to hold it fast with duct tape. Other than those two things, the pack has performed flawlessly. To be happy with this pack, you have to like having some appreciable pocket space on the sides of the pack, something the 4000 offers while still maintaining a fairly trim look. For the price, it’s hard to imagine a better pack out there.

  • Eric Keck

    Very nice well built bacpack I love very comfortable. It does provide great air flow .

  • Lola

    I’m 240 pounds and 5ft tall. I was TERRIFIED of trying to carry a pack for any distance. I’ve never bothered with a pack while hiking because I’ve been in groups and others just carried the things. Now I’ve decided that I want to hike Yosemite. My first trip out with this bag was not all what I expected. I went only 12 miles and up 1,400ft. I hiked two days with a camp one night. I couldn’t believe that I made it! This bag was 30+ pounds all packed up but felt like MAYBE 5 pounds hiking. The waist adjustment is a bit hard to get tight when the pack is wet but other than that, the adjustments are enough to accommodate a larger person. I felt like my normal 130 pound self in this thing, even though I’m 100+ pounds overweight. Teton has given me the motivation and confidence to get back out on the trail and finish a whole hike, straight through! I hadn’t crested a mountain in 30 years. This pack got me there and so much further!

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Lifetime Warranty

TETON Sports has one of the best product guarantees in the business, made possible by our low defect rate and extra-mile customer service policy.

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