MARC Long sleeve shirt in the new VENTIL8â„¢PLUS fabric that provides extreme breathability and UV factor 20+ protection. Tech facts The VENTIL8â„¢ PLUS range makes use of carefully selected materials with unique properties. A VENTIL8â„¢ PLUS shirt transports moisture and excess heat away twice as quickly as a conventional polyester golf shirt. This is made possible by an advanced technology whereby the textile fibers are designed to disperse perspiration and moisture over a larger area, allowing moisture to evaporate considerably more rapidly.