This A-game Hydro was engine with a hydrophobic technology on the crown panels designed to bead away waterfall and preventing absorption. Constructed with durable materials, the hats are water repellant, floatable, and breathable. This hat is brand new and has never Bern worn, with the tags still on. This hat is a size small which is 7 - 7 1/4 inches. Metric measurements are 56.5 - 58.5cm and inches are 22 - 22 5/8 inches.