EVOC: HIP PACK HYDRATION BLADDER for our HIP PACK RACE.? Slide-Seal? Top with Tether? 36? HydraFlex? Tube? Blaster? Bite Valve? Plug-N-Play? Connect System? Removable Pack Clip? Silicone Lubrication? Basic Care & Use InstructionsMaterial: THERMOPLASTIC POLYURETHANE; HDPE; SILICONE1,5L, 130g, 28 x 18 cm