The OMP KS Summer short-sleeved underwear top is made from a low-density jacquard material to provide increased breathability in hot conditions. The moisture wicking material moves moisture away from the skin, giving greater levels of comfort to the rider, allowing for better levels of concentration. Available in 3 sizes. Each size covers 2 size ranges. Small - (XS/S) - 34-38" (88-96cm) chest Medium - (M/L) - 38-42" (96-108cm) chest Large - (XL/XXL) - 42-47" (108-120cm) chest