Nathan Chroma Steel Bottle Nathan hydration colour:Blue OpenSwim (formerly Xtrainerz) is engineered

OpenSwim (formerly Xtrainerz) is engineered with Shokz’s signature open-ear design and 7th generation bone conduction technology to ensure bud-free

This unique feature gives you more energy so you can run lighter and faster

11 mg magnesium

- 8g protein: all essential amino acids to reduce muscle fatigue

Nathan Chroma Steel Bottle Nathan hydration colour:Blue OpenSwim (formerly Xtrainerz) is engineered18 8 Double Wall Insulated Stainless Steel Keeps liquids cold for 24 hours, hot for 12 hours Zero condensation or sweat Triple insulated for premium heat retention All day hydration never looked so big and bold as with these colorful 25oz (740mL) double wall insulated stainless steel bottles.