Sure, sackpacks are easy, but Under Armour amped up the performance with an insulated water bottle sleeve and UA Storm so rain rolls right off.

Product Details:
Water-resistant UA Storm technology keeps your essentials dry
Tough, TPU-coated bottom panel extends up the front for added durability
Full-length, front insulated zippered pocket doubles as a water bottle sleeve or valuables pocket
Front valuables pocket
Adjustable cording straps can easily be tied for a custom length & fit
Molle webbing on front panel for additional attachment points
Custom UA sternum clip

Specifications:
Volume: 22 L
100% Polyester
Dimensions When Full: 21"H x 15.4"W x 2.6" D
Imported