Amazon.com : Hydration Tube Covers Bladder Insulators are Compatible with Camelbak Reservoir Water Bladder. Will fit MIL Spec Antidote and Crux : Outdoor Backpack Reservoirs : Sports & Outdoors
Mil Spec Crux™ 3L Lumbar Reservoir
CAMELBAK CRUX HYDRATION RESERVOIR BLADDER ANTIDOTE 2L & 3L VERSION BPA FREE BLUE | eBay