Keep your hydration system at an optimal performance level with the Osprey Hydraulics(R) Reservoir Hose. This replacement hose is made of quarter-inch food-safe tubing that is designed for faster water flow and dependability. DESIGN Replacement hose for hydration system 1/4" tubing Designed for faster water flow BPA-free, phthalate-free, lead-free Certified food safe according to FDA and EU