1,HEAVY CALIBER: Hydration bladder with screw mouth large diameter, irrigation more convenient. Large capacity design, can hold 2L water. 2,DOUBLE LOCK SWITCH: Water storage bladder bag features a double lock switch for more scientific use and to prevent water leakage. 3,SAFE MATERIALS: Leak proof hydration bladder is made of EVA and PE material synthesis, does not contain any harmful ingredients, no odor. 4,EASY TO CLEAN: Water bag is easy to clean, with a large opening that allows you to get into the corners inside and give your water bag a thorough cleaning. 5,APPLICABLE SCENARIOS: Blue hydration bladder can help you stay hydrated during outdoor activities such as running, skiing, hiking, biking, camping, etc. Item Type: Hydration Bladder Material: PE, EVA Size: Approx. 35.1x17.5cm or 13.8x6.9in Color: Blue 1 x Hydration Bladder Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store