Four-way stretch polyester chassis is form-fitting, breathable and allows vest to be worn over riding jacket Snug performance fit eliminates wind flap, unlike the plastic safety vests of yesteryear Hi-viz body is paired with retro reflective side and back paneling that aids in being detected in low-light conditions Quality YKK« zippers Durable sublimated graphics. VEST MILSPC2 HV-YEL L/XL