High Sierra Express Lumbar Pack (Chipotle, Tungsten) Large, top-load main compartment has CD/MP3 player pocket with PVC headphone port. Zippered front accessory pocket, with key fob, is great for change, I.D. and other small items. Dual-side mesh water bottle pockets. Adjustable side compression straps secure contents of pack. Equipped with one 500ml GE Lexan&reg shatter-resistant bottle.