Teton Sports Explorer 4000 Internal Frame Backpack Review

TETON Sports Explorer 4000 Internal Frame Backpack Review

Teton Sports Explorer 4000 Internal Frame BackpackThe Teton Sports Explorer 4000 is packed with features that would normally found in more expensive backpacks. Maybe the greatest feature is full length adjustable torso that allows this backpack to be adjusted for those 5’1″ all the way up to 6’4″.

Key Features

  • The rugged, internal frame backpack has a 4,000 cubic inch capacity
  • Dual aluminum stays within the pack adjust to the contour of your back
  • Full-length adjustable torso and adjustable shoulder straps for a more comfortable fit
  • Padded shoulder straps, padded waist belts and padded lumbar area for maximum comfort, with airflow system to reduce heat
  • Separate sleeping bag compartment, a great feature
  • Includes a bright yellow attached rainfly and is hydration system ready
  • Height-adjustment shoulder straps accommodate a wide range of torso lengths


The padded back and airflow system on the Teton Sports Explorer 4000 provide more than enough padding in the right spots whilst allowing substantial airflow to prevent your back from getting too hot, perfect for those long wilderness trips. Its contoured shoulder, lumbar, and hip pads help ensure a comfortable trip.

The Explorer4000 also features a padded water bladder pocket for your favorite water bladder up to 3 liters in size, perfect for a long hike. The backpack comes with plenty of pockets including side zippered pockets, mesh pockets, and a top zippered pocket providing that all important room for smaller accessories. There’s even two spots for walking sticks.v

TETON Sports Explorer 4000 Internal Frame Backpack ReviewA top-loading main compartment and a sleeping bag compartment complete the pack. Includes bright yellow attached rain fly and is hydration system ready.


  • The backpack is affordable especially for a bag of its class.
  • It’s effectively waterproofed and has a rain-fly cover to dope with heavier rains.
  • There are plenty of pockets, straps and daisy chains to carry everything you will need to survive.
  • The 4000 cubic inch capacity offers plenty of space to carry whatever you me need to survive.
  • The Teton comes with two mesh water bottle pockets on either side, brilliant to carry those all-important fluids.


Some customers have complained that the zippers can get stuck but many reviews state that the zippers do not stick and that they open and close just fine.

Customer Reviews

Many customers have commented on the fact that material the Teton Sports Explorer 4000 is made from seems durable and that there is a good amount of padding along and straps for a comfortable fit. The great thing is that everything is adjustable including torso height so you won’t have any problems getting this backpack to fit all body shapes and sizes.

For those occasions when a thunderstorm arrives it also has a quickly accessible rain cover which will definitely come in handy during those thunderstorms. The compression straps on the outside of the pack are big enough to hold a decent sized tent. The top will hold a sleeping pad without a problem. And if not, you can remove the straps or just pull them flat.

“Just got my Explorer 4000, and immediately packed my 20 degree sleeping bag, and it fit FINE – I took it out of it’s compression sack and stuffed it in thru the bottom zipper. I almost had room for my pillow and a queen-size sheet insert I use, but the insert was a little tight, so it went on bottom of main compartment. I got my pretty bulky sleeping bag in just fine, with no trouble zipping. I am certain only the biggest of sleeping bags would not fit.”

Jeremy Treichel, Amazon Customer Review

“This pack is perfect for camping! I couldn’t fit a warm sleeping bag in the hole though. But i could fit a lighter weight sleeping bag with a compressor pack in it. very sturdy and very comfortable. I am 5’6 and female and it was a great fit for me. Lots of pockets for different things. We used this for camping in Alaska during the summer.”

Nurse Kelli, Amazon Customer Review

TETON Sports Explorer 4000 Internal Frame Backpack Review“I am an experienced backpacker, and an Eagle Scout. This is an excellent cargo pack. I was disappointed that the advertisement did not notify customers that the pack does not include the hydration bladder and tube, just the pack has a compartment and passage for them. The pack is easily customized to fit and be comfortable for any adult or older youth. The loops for holding an Ice Ax are a bit of a gimmick, but the pack is a quality unit that stands for itself even when the gimmicks are ignored.”

Jeremy Yetter, Amazon Customer Review

The Teton Sports Explorer 4000 has been rated 4.6 out of 5.0 by 717 customers on Amazon.com an impressive rating indeed. Click here for more verified customer reviews on Amazon.


Overall the Teton Sports Explorer 4000 Internal Frame Backpack is a well-designed backpack. It is a fantastic pack to get out to the great outdoors in. It is a very durable pack and is adjustable so provides great comfort during wilderness excursions whatever your size. It’s weight not too much for those long hikes. And for the price, you really can’t beat it.

If you have found this review useful then read the in-depth Teton Sports Hiker 3700 Review.

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