WeatherBeeta Reflective Wrap Exercise Sheet Silver/Black. Keep safe and stay seen with the WeatherBeeta Reflective Wrap Exercise Sheet. Presenting a waterproof and breathable exercise sheet, the Reflective Sheet is perfect for night time or dim light hacks with its all over reflective material which reflects any light source to ensure you stay visible. With a 210T polyester lining, the Reflective Wrap Around Exercise Sheet is complete with a tail flap and tail cord with touch tape closures at the wither and around the chest for easy application.