Mazama Designs Sidestream Glide, 1.3 Liter Nordic Hydration Pack, Hydration Belt for Skate or Classic Cross-Country Skiing with Retracting Drink Tube Nylon Retracting drink tube lets you hydrate as you skate or glide Retracting drink tube can be grabbed pole-in-hand, to hydrate while you skate or glide Fully-insulted bite valve, drink tube and bladder are protected to minimize freezing Sits in the small of your back, close to your center of gravity for a stable fit that won't interfere with pole action High flow bite valve can be accessed easily with gloved hands Top-fill bladder for quick and easy filling without removing the bladder from the pack