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. HydraPak Arcticfusion Tube | Christy Sports