Sunspel Polo Shirt. A short sleeved polo shirt from Sunspel made from 100% Supima cotton giving the polo a super soft finish, Branded shell buttons, Ribbed collar and cuffs, Side vents, True to size, Regular fit, Machine washable cold. Sunspel, founded in 1860 is an innovative British brand with a contemporary edge. Sunspel make luxury clothing. Founded by Thomas Hill Sunspel is wardrobe essential.