Reflective Armband 1 Pair From Blue Lolly - LED Flashing Running Lights - Night Safety Light - Includes one D key ring as BONUS - Designed for Running, Jogging, Walking, or Cycling LIGHTWEIGHT, SOFT, FLEXIBLE NYLON AND EXTREMELY EASY TO WEAR: This armband is lightweight and soft to prevent fatigue and discomfort for wearers of all ages. ULTRA HIGH VISIBILITY: Powered with small button battery, Featuring three safety modes at the touch of a button - steady, slow flashing and rapid flashing - you'll be more visible while running, cycling, jogging, walking the dog or just being outside. Enjoy high visibility and maximum security. LIGHTWEIGHT & ADJUSTABLE: one size fit all. LED Slap Band has a dimension 1 1/2" x 13 1/2", by simply slap wrap it will fit on both adult and children for the wrist, ankle, and arm. To apply on the biceps, please consider the dimension to see if it fits on. FREE BONUS: one D key ring as BONUS. 100% MONEY BACK GUARANTEE: Blue Lolly offers no-risk, no-questions-asked money back guarantee.