Ideal for day or hiking packs, this hydration reservoir features a neoprene insulated feed tube and durable silica gel bite valve Features: -Food grade BPA-free Thermoplastic Polyurethane (TPU) materials -Fully welded anti-tear construction -Anti-microbial and anti-fungal -7mm diameter and 97cm long insulated feed tube -Soft durable silica gel bite valve mouth piece with easily controlled on-off mechanism