Unique design，anti-swing and special groove design inside the flex 2 strap with extra clear silicon fastener ring, double secure to prevent the end of the flex 2 wristband from sliding out | 10 colors available, white, blush pink, lavender, blue, pink, slate, navy, brown plum and black. Personalize your flex 2 accessories bands to fit your mood and outfits in daily life with this brand new color choices | Hypoallergenic, the flex 2 wristband is made of a flexible, durable premium material which is soft and hypoallergenic for women men girls boys | Two sizes available, small size fits for 5.1"-7.0" wrist. Large size fits for 6.1"-8.5" wrist. Please choice the right size while placing flex 2 fashionable bands | High quality services, 100% money back guarantee if the flex 2 sport band doesn't fit or meet all of your expectations.