igadgitz Xtra Lumin Safe Reflective Hi Vis Waterproof Adjustable Wearable Silicone Armband Strap with LED Flashing Light for Running, Cycling, Walking & More Be seen with the iGadgitz Xtra Lumin Safe wearable strap. Ideal for anyone wanting extra visibility, particularly when in dark or low light  walkers, school children, runners or when cycling. Two light modes; continuous and flashing with battery life of up to 100 hours. Comes complete with 2 x CR2032 batteries. Multi use: Has a washable strap and can be worn as an armband, on the leg or ankle, a trouser clip, attached to a bike helmet, to a backpack and much more. Complete with reflective patch to give extra safety and visibility. Weather resistant. Strap circumference when fastened approx. 31cm to 41cm