Compatible for M3 Band, M4 Band Bracelet It can be adjusted to different length, you never worry about it too long or too small. Skin-friendly and provides comfortable feeling when you wear it during sleep. Simple and fashionable, easy to install and remove with excellent and fashionable design. Suits women men girls boys for leisure places. A good replacement for your old or lost band strap. Personalize your wristband to match your daily style with this brand new color choices.