Ergon 3-liter hydration bladder for Ergon backpacks. This hydration bladder is made of hygienic polyurethane and is FDA-approved. The material is very robust and can be stretched up to eight times its surface area without tearing. The large, sliding closure makes filling and cleaning the bladder easy. The included drinking tube is extra-long and tasteless, with a 90-degree bite valve. It is low-profile and therefore completely kink-resistant. The internal safety valve prevents the bladder from leaking when the tube is not connected. The hydration system is suitable for all Ergon Bike backpacks. Product specifications - Brand: Ergon - Primary base color: Transparent - Type: BH300 water bladder - Material: Food-grade polyurethane - Accessory attachment system: Other