HBirdPc LED Armband Lights Glow Band Reflective Bracelets for Running Cycling Walking Bicycle,Replaceable Battery [3-Pack] High Quality Silicone Material: Does not absorb sweat (It is not cloth and can prevent moldy smell). MAXIMUM VISIBILITY: HBirdPc reflective wristband has very good light makes you highly visible for all the traffic around.You can be seen as far as 1000 ft (300 m) away.This will ensure your safety. ONE SIZE FIT THEM ALL: SUPER bright, Comfortable,Soft,Easy to use.Comfortable armband with lightweight technology ensured no chafing or discomfort.Come with adjustable strap, can be tied on arm, wrist, lower leg, bike or anywhere you like.Apply to Children,Adult and Pet. EASY BATTERY CHANGE: opened battery compartment with the coin , you won't have to fight small screws like other models! THE BEST GIFT: HBirdPc Best LED Armbands for anyone passionate about outdoor sports; BEST GIFT for FAMILY and FRIENDS, making their life fun and easy; Most important for parents, it makes sports fun and attractive for children