Keep the water flowing under harsh conditions with Mazama's Neoprene Drink Tube Sleeve. Add a layer of insulation around your drink tube and an insulated, easy-access pouch over your bite valve. Keep water from freezing in your drink tube in cold weather and keep it cool in warm weather. Simply insert your drink tube into the pouch end and work it through to the other end. If necessary, cut a break in the sleeve to accommodate a Quick-Connect. Cut any excess sleeve from the end and you're all set. Overall length (including pouch is 42"). Sleeve will fit on 1/4" or 5/16" inner dimension tubing.