Note: This's an official strap only .. does not include the Whoop 4.0 fitness device. 

Product Features:

- New SportFlex strap for Whoop made of silicone.

- Made from soft and comfortable high-quality silicone.

- Water-resistant .. sweat-resistant .. and stain-resistant.

- Designed for easy size adjustment.

- Great for sports or daily use.

- Band size ranges from 130 mm to 210 mm.

- Easy to clean .. you can use a lint-free cloth for both dry or wet cleaning.

Warranty: One Year