JRB Golf Midlayers can be worn over a base layer such as a JRB Golf Fashion Shirt when it’s cold or it can be worn next to the skin. Made from a soft stretch polyester material it gives a comfortable fit that does not restrict your swing. Midlayers provide insulation to keep you warm when it’s cold by trapping heat generated by the body and when it’s warm they give maximum breathability and moisture transportation to keep you cool and dry.  Machine washable. Chest sizes: S = 92 cm, M = 96 cm, L = 100 cm, XL = 104 cm, XXL = 108 cm.