THOR Vapor Hydration Pack. 1.5 liter BPA-free bladder with an easy clean, big bore top. Magnetic bite valve holder. Thermal-lined bladder compartment helps keep fluids cool. Sternum strap and buckle keep gear secured. Pack harness is angled away from the underarms giving total freedom of movement. Harness made with air mesh for ventilation. Neoprene hydration tube sleeve helps keep fluid cool. External zippered pocket. Reverse face YKK® water resistant zip on front. Micro-fleece lined glasses / media pocket. THOR reflective logo. 1200D ballistic polyester / 600D reversed faced poly shell. Standard dimensions: 16"L x 10"W x 0.5"D. Metric dimensions: 40.64 cm L x 25.4 cm W x .1.25 cm D.