Camelbak Rim Runner 22 Backpack Lightweight Construction - Formed from lightwieght rips stop fabric and stretch mesh construction. Adjustable shoulder strap - Contoured with a mesh back and fully adjustable to provide a highly comfortable fit. Adjustable waist strap - With a mesh back and built in zip locking pockets. Multiple Pockets - Ensures secure storage for a range of items. Antidote Reservoir - One of the best on the market with a multitude of features.