The ciele FSTCap SC EQ Frame S is a rugged low profile running hat designed to go the distance with durable design that is also breathable. The cap features a robust frame for structure made from TUFFtek canvas and offers UPF protection from the sun. ciele's COOLmatic | PLUS MIKRAmesh offers durability and breathability. Reflective detailing is added on the front and back for visibility during low light hours.