SKU: SS23981 Weighs: 345g Capacity: 12 Litres Frame: Frameless Padding: Padded Back This comfortable and highly breathable pack evenly spreads its weight across your upper body to reduce bounce. CamelBak says:  We’re here to help you prepare for whatever challenge lies ahead, whether it&rsqu… Zephyr Vest 11L with 1L Hydration