Nathan HPL 028 Vest Lightweight, breathable Wall Mesh with soft perimeter binding - feels great against skin and won't damage technical apparel Vertically adjustable sternum strap; simple, lightweight side compression straps Dual front essential pockets - one carbo-gel holster, 1 zippered Power Stretch Mesh back pocket for stowing jacket, gloves, and/or sleeves Weighs only 4.5 ounces