Why change the classics born out of the portable soft water bottle that started it all, our updated 414ml version features an integrated wrist strap and a rigid exospine for superior comfort and efficiency. It's the perfect pairing for marathons, trail running , hiking, cycling, climbing and all autres outdoor activities. Weight with bottle: 42 g 414 ml bpa-free soft drink bottle with bite valve. Rigid exospine creates a superior feel and support for the hand. Ergonomic wrist strap for grip-free comfort. Reflective for improved visibility