High-performance Gravel Gear® CoolMax® tee delivers the ultimate in comfort by wicking moisture away from the skin and creating a cool evaporative effect. Designed to keep you cool, dry and protected from the sun on the hottest days. The secret is the CoolMax fiber, a 4-channel polyester fiber woven in cross sections to allow air to flow through the fabric and increase the surface area for wicking moisture, keeping the skin dry and cool. This 52% polyester/48% CoolMax blend is a durable, lightweight fabric that will keep you cool and comfortable. CoolMax is a patented fiber construction that creates cooling properties that will not wash out like less effective coatings. Garment is rated UPF 30 for sun protection. Easy-care shirt is wrinkle-free and always looks sharp. Features underarm panels for mobility and improved fit. Comfortable crew neck and cable knit stitching for added breathability.