Hydraform™ Handheld The handheld's ergonomic configuration allows your hand to relax to a natural position - eliminating hand cramping and tension. The quick-adjust strap allows for a custom fit. Comes with a custom-molded, BPA-free, 20oz. Hydraform Bottle. "I found the HydraForm Handheld™ superior in ease of carrying to any handheld system I have tried. The strap adjusts well for use while wearing gloves for cold weather runs." -Ultra Running Magazine Ergonomic configuration allows hand to relax in a natural position, eliminating hand cramping and tension 40% lower profile for comfort Ultra-comfortable minimalist strap design won't trap sweat Breathable AirFlow™ mesh outer and moisture-wicking ultra soft inner Stretch-free and durable bottle harness Adjustable custom fit with no-slip quick hand release Includes exclusive 20oz. Hydraform™ bottle All Amphipod bottles are recycling symbol #4 LDPE and are BPA-free.