The Tube Insulator keeps the drinking tube and drinking valve of your Source Hydration Bladder insulated in extremely cold weather. The small pocket at the mouthpiece-end of the insulator is designed to hold a small hand-warmer device. Adding the hand-warmer prevents the drinking valve from freezing. Matches all Source Water Bladders.
The Tube Insulator keeps the drinking tube and drinking valve of your Source Hydration Bladder insulated in extremely cold weather. The small pocket at the mouthpiece-end of the insulator is designed to hold a small hand-warmer device. Adding the hand-warmer prevents the drinking valve from freezing. Matches all Source Water Bladders.