These 3-pack nylon replacement straps are compatible with Google Fitbit Air. Featuring an 18mm width, they offer a seamless and secure fit. Note: Not compatible with other trackers or watches. Made of breathable woven nylon, the bands are crafted from durable, skin-friendly material. Lightweight and comfy to wear, they are hand washable and quick-drying, perfect for gym workouts, daily wear, travel and outdoor activities. Suitable for wrists measuring 6.2"–8.6"(160mm–220mm), each strap comes with an adjustable hook-and-loop closure. Without fixed holes, you can freely tune tightness to achieve a tailored fit. Enjoy tool-free installation: simply apply a light press to swap bands effortlessly in seconds. Save time and alternate between different band colors at will to fit any style. This set includes 3 distinct strap colors to match your daily outfits, and you may share spare bands with your partner, friends and family. Tracker is NOT included.