Compatible with SUUNТО 7 / SUUNТО 9 watches. Used to fit wrists from 180mm to 230mm around which also depends on the strap width and watch size you choose. Made of high-quality silicone with metal buckle closure, comfortable to wear. Easy to adjust the length, fit for men and women. Porous design, breathable and comfortable, very suitable for long-term wearing. Washable and Waterproof: Perfect for outdoor fitness, sports, any type of workout or daily use.