The exterior of this 4 quart canteen has a blanket material surrounding the Canteen insulating the contents from extremes in temperature. The polyurethane-lined interior keeps water fresh and cool in even the warmest temperatures. Insulated screw-on cap is tethered to the Canteen to keep water where you put it, while on that great adventure. Comfortable, adjustable web shoulder strap Measures 9" Dia x 4"H. Weighs 1.08 lbs.