REI Flash 22 Pack

Lightly padded stretch-mesh shoulder straps move freely; robust construction provides durability
Mesh back is soft and breathable; back also has lightweight padding for added comfort
Hipbelt and sternum strap can also be detached; sternum-strap buckle doubles as a safety whistle
Includes a zippered lid pocket and an interior zippered pocket
Has an internal sleeve to hold a hydration reservoir (sold separately); includes a port to route the sip tube over either shoulder
Large mesh side pockets for bottles and other trail essentials
The REI Flash 22 Pack also has 2 daisy chains that let you attach items on the front