Ultimate Direction Bladder is the ideal addition to your Ultimate Direction Race Vest or Fastpack. The Ultimate Direction Bladder features a wide mouth opening for easy filling and cleaning (reversible). Fast sealing with the slider that quickly seals when slid across the length of the opening. The Hydraflex Tube is 100%TPU tubing (no PVC) drapes better over the shoulder while providing strength and resistance to kinking. The Ultimate Direction Bladder also features a Plug N Play removable press to fit tube connection making cleaning easier. On the bladder itself, single seam welding increases reservoir durability. The Surge Valve is a high flow bite valve with a twist to shut off.