Sleek, element-deflecting material withstands wear, perspiration and electrolyte drinks. More AerodynamicOptimal airfoil shape reduces drag caused by stem and headset spacers with no increase in frontal area5:1 ratio design for best aerodynamic advantageSuper smooth, non-porous, low friction exterior reduces drag Focus on the Road: Smarter Features for Carefree StorageTwo large, Super-Slide zippers for ease of access even when race day adrenaline is at its peakSilver colored interior makes it easy to find contents Installs Quickly and Stays in PlaceThree long Velcro straps conform to a variety of top tube shapesNon-slip bottom grips top tube with 17lbs of grip forceStructured inserts hold aero shape Dimensions: 10.5" (26.7cm) L x 2.1" (5.3cm) H x 1.5" (3.8cm) W MaterialNon-porous, durable Vinyl exterior. Reflective, insulated interior lining. Anti-slip rubber base. Volume: 0.43 liter (26 in3) Weight: 108 g (3.75 oz)