Colors: Blue / Green / Red / Orange 1000 denier construction throughout Dual daisy chains Six compression straps YKK zippers One internal pocket Internal hydration pocket and tube exit port 0.50 inch foam sheet contour molded for unparalleled comfort. 0.13 inch high-density foam top layer, for rigidity. 0.04 inch HDPE stay in shoulder strap for increased longevity. 0.06 inch HDPE frame-sheet for structural support. 0.50 inch foam-sheet contour molded for unparalleled comfort. 0.13 inch high-density foam top layer, for rigidity. 0.04 inch HDPE stay in shoulder strap for increased longevity. 0.06 inch HDPE frame-sheet for structural support. Medium/Large 700ci - Size determines shoulders strap size