Features Includes a low-profile Amphipod Hydraform 12oz bottle Removable insulator to keep drinks hot or cold for longer Expandable zipper pocket with internal divider for gels, ID, or keys Ultra-comfortable minimalist strap design won't trap sweat Ergonomic design allows hand to relax and eliminates cramping or tension Durable, stretch-free bottle harness Adjustable fit with a non-slip quick hand release Reflective detailing for increased visibility in low light conditions