Higo 2ed Generation LED Armband, Patented Heat Sealed Glow in The Dark Water/Sweat Resistant Reflective Belt Wrist/Ankle Glow Band Night Safety Cycling Jogging PATENT NEW DESIGN: this 2nd generation LED Slap Band is accomplished with heat sealing technology, which is in US PATENT PENDING. Different from 1st Generation of HiGo led slap bracelet by sewing. RAIN/SWEAT RESISTANT: This armband also add some layers of TPU coating on the front& back side fabric to let the machine heat press each parts together. That's also make this slap armband can be rainproof& sweat proof. SUPER BRIGHT IN THE DARK: this wristband glows with led& light-guiding tube, also with reflective printing that can be reflective when highlight shot. be seen & keep people safe at night when do outdoor sports, like running, jogging, cycling, hiking. PORTABLE & USER-FRIENDLY: Super Easy to use it by simply slapping against the wrist, arm or angle part, it will curl wrap automatically. The Slap Band is only 1.3 OZ. by weight. Top material is super thin high strength nylon material and bottom layer with Lycra fabric to make it soft to prevent fatigue and discomfort for wearers of all ages. Comfortable On Both Children And Adults and Pets. EASY TO REPLACE THE BATTERIES: This 2nd generation glowing armband, add a pull-tag to pull the PCB easily to replace the battery after used up, and with spare batteries in the package box.