Logging miles on hot days or racing in the summer heat - staying cool is key. This minimalist handheld keeps hydration cool 38% longer than a standard flask. An innovative thumb loop allows you to hold the flask securely without gripping or squeezing. Versatile and ambidextrous, it can be fitted to either hand. The adjustable, sweatproof strap fits most hand sizes and snuggly stays in place with a Velcro-style closure. Topped with our SpeedFill(TM) Cap for quick refills on the go.