Sierra DesignsFlex Capacitor Backpack, Adjustable 25-40L Volume Ultralight Backpacking Pack with Y-Flex Suspension System, Peat

I love the hip pockets and the lightweight frame. Also the colors are fun but not obnoxious. The expandable capacity means I can use this as a day pack or for 2 day trips if I pack light. I searched long and hard for a new pack and this met all my requirements. Very pleased and highly recommend it.

Super comfortable and frame really helped keep weight off my shoulders. Love the flexibility to adjust volume to suit the needs of my hike.

Excellent materials and ample space to carry what is needed!

I just recently got this pack and I really like it! it is much better than the one I had previously and it transfers the weight all to my hips. I took it out on a day hike recently and loaded it down with a bunch of unnecessary items for a day hike just to see how the pack handles the load. It was amazing, my shoulders had no burn from holding the weight all day. The exterior pockets on the hip are very spacious, the top pocket is a little small but that's no big for me. I love the simplicity of the pack and the back ventilation. My day hike included a pretty steep rock scramble and the pack didn't shift on my back at all! highly recommend this pack!

A highly capable and flexible pack that delivers comfort in the outdoors. Sierra Designs was clever in naming this pack, but they should add flashing lights and the ability for it to enable time travel. Seriously though, you will love this backpack when you take it on your next adventure!

I bought the 25-40l because I'm old and lazy and decided to quit carrying stuff I don't use when I go hiking & camping. Keeping in mind I'm trying to pack under 20lbs and have purchased gear to facilitate that, this pack holds my tent, sleeping pad, pillow, sleeping bag, mess kit, stove, fuel, first aid kit, thermals, rain jacket, compass, map, flashlight, headlamp, beanie, water bottle, water filter, water bladder, knife, camera, gps, xtra batteries, toiletries, and food. Could probably strap a few more items externally if needed, but I usually only go out for 1 or 2 nights on any given trip so it works for me. Really like the cinch straps. Pack is compact, comfortable, and load is secure.Really like the pockets on the hip pads and the extra pockets on the straps. Side pockets will easily fit a 32oz Nalgene water bottle. Strap pockets can fit about a liter bottle if needed but also come in handy for small items (pocket knife, compass, gps, etc.)The only complaint I have, and it's a minor one for sure, is the top pocket is way smaller than I'm used to, but the other pockets do help make up for it.

This looks like a great quality pack. I like the design and it is comfortable. It ended up being too small for me since I usually back pack for multiple nights and carry some of my kids’ items. But if I need a smaller pack in the future, this will be a great pack