This ultra form-fitting pack for longer, serious trail running comes in three sizes for precise fit. Includes organizing pockets in the main compartment, and Sensifit construction, a stretch breathable mesh that literally wraps the pack and it's contents around the body for a secure, non-binding, abrasion-free fit. Large enough to carry hydration and required equipment for UTMB and other long endurance races. Delivered with new PVC/BPA free bladder.
Lightweight insulation kit ensures your liquids don't freeze or overheat in the reservoir or the tube, and includes a protective garage for the valve. A great solution for running or Nordic skiing in extreme heat or cold.