Amphipod Hydraform Thermal-Lite Handheld 20oz Ultra-light, ergonomic configuration allows hands to relax in a natural position - Eliminates round bottle hand cramping/tension Jett-Squeeze cap for leak-free quick shot hydration; Quick-adjust no-slip strap The custom cushioned easy-grip insulating sleeve is easily removable for maximum use versatility and washing Minimalist strap with expandable utility pocket and wicking ultrasoft inner; Secure strap zippered pocket for essentials: iPod, phone, nutrition, keys and more BPA Free bottle; A great combination of hot and cold weather use