This jacket is made of a very comfortable, thin and lightweight material. The fabric is infused with Cocona activated carbon which inhibits odor and blocks the sun's UV rays with a 50+ SPF factor. It has a great evaporation cooling factor for heat regulation. The Terrex Swift Midlayer Jacket was designed with motion in mind, so you don't have to worry about it holding you back when you're in action. FORMOTION ultimate performance and comfort while in motion. Cocona activated carbon, ultimate in evaporation cooling, odor management and UV protection (50+ SPF). Adjustable draw cord at hem.