HydraPak ArcticFusion Tube - Ice belongs on the mountain, not in your hydration system. That’s why we created the ground-breaking ArcticFusion Tube Kit. This innovative solution is a premium tube system that helps keep water flowing in freezing temps. It has our Phaser bite valve on one end and the Plug-N-Play connector on the other, and it has 50% more foam insulation than competing brands. Features Helps protect water from freezing in extreme temperatures Designed for a wide range of cold weather activities Steady flow, angled Phaser Bite Valve Insulated valve base cover and dust cover Tube designed in the ideal durometer for easy routing Universal ¼ in diameter fitting with Plug-N-Play connect system Safe and reliable, 100% BPA & PVC free