[Material] Shock absorbing reinforced plastic, Urethane [Product Details] Armor protector (spinal chest protector). The surface is equipped with a shock-absorbing reinforced plastic protector that is made to withstand stronger impacts. Made primarily for driving on forest roads and closed courses. Urethane pad on the back. The center front part also has ventilation holes to ensure breathability. Plastic joints are movable to follow some torsion in the riding position Reduces impact when you hit the spine chest due to falls. Details: Shock absorbing reinforced plastic, urethane pad, adjustable waist belt, bench rate hole, Size guide: S length 19.7 x shoulder width 18.5 x thickness 0.8 inches (500 x 470 x 20 mm), M length 21.3 x shoulder width 21.7 x thickness 0.8 inches (540 x 510 x 20 mm) *Each size is measured at the longest or thickest part