The slap wrap is used when walking, jogging, an cycling for safety reason.To use the slap wrap, hold the reflective surface upward and hold tightly one end of the reflective band, tap the wrist / ankle gently to let it wind around, To straighten unwind the strap and stretch it until it makes a sound like a "crack" .In Europe market for the reflective slap wrap, CE, EN13356 standard is requested if it is for safety use. We have many colors for your choice.You should pay attention to the fake material ,they looks like real 3M, Reflexite , but the reflex is completely different.It is a very nice item for promotion.