We designed the LED Running Vest with serious runners in mind. Available in two sizes (S/M and L/XL) it's a sleek comfortable and functional way to be seen and safe on low-visibility early morning and late night runs. Made of lightweight waterï¿½resistant mesh its two illuminated flexible polymer strips (front & back) can each be set to one of two bright LED modes (steady glow or flash) and the sides are trimmed with 360ï¿½ passively reflective safety accents. The power/mode buttons are easily accessible on the front and back of the vest and easily adjustable straps at the waist can be cinched for a precise fit. Two zip closure pockets in the back are individually sized to hold everything you need for your run with one of the back pockets featuring a weather-resistant design to keep your cell phone or other valuables safe if you get caught out in the rain. There's even a handy key clip for your home or car key.