The Apple Nylon Sport Loop Nike watch strap is soft, breathable and light. This makes this strap ideal for sports. The strap is made of woven nylon threads. The nylon reflects when light shines on it. You can easily close the strap with the Velcro closure. This makes the strap easily adjustable. The inside of the strap contains a large number of small loops that not only form a soft layer, but also provide ventilation during exercise. This original Apple watchstrap is suitable for Apple Watch 38 mm and 40 mm and fits around a wrist of 130 to 190 mm.