Simple, ergonomic, efficient and adjustable, the Sync Hydration Belt makes one-handed refueling a snap. A simple flip of the wrist and the bottle is free from the bracket. Snap it back with secure engagement and your hands are free. Easy to use and adjustable, the Sync Hydration Belt takes race-day and training refueling to the next level. Single hand operation, secure engagement Universal left/right bracket Brackets are made of lightweight injected composite “No leak” cap and tab bottles 8 oz /235mL capacity BPA free and food safe Textured pads are injected EVA foam Elastic belt closure for custom fit Reflective piping and accents Size Chart XS - 25-28" (71cm) S - 28-31� (78cm) M - 31-34� (86cm) L - 34-37� (94cm) XL - 37-40� (101cm)