The Elite is a revolutionary reversible bladder. The hydration bladder is made out of TPU (thermoplastic polyurethane) and comes complete with a 45 degreeBlaster bite valve,easy quick connector withPlug-n-Playand flexible non-kinkingHydraflexdrink tube. The hydration system is reversible for easy cleaning and drying. The hyration bladder has a patented wide slider opening for quick filling and leak proof seal and also has RF welded seams to create superior bonds at a molecular level. The hydration blader is BPA and PVC free and is made out of FDA and EU approved materials. The hydration bladder is also dishwasher safe and is naturally Anti-fungal.