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Why race in a trail running shoe that diminishes your achievement
This setup creates a smooth
more shock absorption
We sculpted our full-length Air Zoom unit to deliver a propulsive feel and Nike's highest energy return from heel to toe-off
All-natural movement
UltrAspire Extra Battery Battery size:18650 Why race in a trailThe UltrAspire 21700 Battery is pairs with the Lumen 800 Solstice Waist Light to ensure you have power to run through the night. *This battery pairs ONLY with the Lumen 800 Solstice. For any other 3D Waist Light, please see our UltrAspire 18650 Battery. The UltrAspire 18650 Battery has 3400 MaH and is programmed for low amperage output to ensure your Lumen has the optimal power source for the best performance on the road or trail.
