Forget bulky backpacks and awkward waist packs. The form-fitting VestPac(TM) JacksonPac's two front pockets offer convenient storage while the low-profile back panel houses a hands-free hydration system.Form-fitting athletic design makes this chest pack perfect for active outdoor sports such as paddling, running, cycling, hiking and fishing.Designed to be the most low-profile, breathable & comfortable hydration/accessory pack on the market.You can even wear it under a jacket, life jacket or backpack!Ample front pockets with cinch straps provide secure, comfortable, convenient storage for electronic devices, your wallet, keys, snacks, fishing tackle and other items. Revolutionary 3-D Airmesh adapts to any climate, keeping you cool in the summer and warm in the winter.The hands-free 1-liter hydration system lets you quench your thirst without interrupting the action.Four heavy-duty adjustable straps ensure a perfect fit for all sizes.