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
CAMELBAK Rain Cover (M/L) 60114 B&H Photo Video
A-TACS FG Non Insulated Drink Tube Sleeve | Gearhandle.com