Ultimate Direction Nimbus Tees - Men's White XL. Unlike traditional wicking that washes off over time Delta technology is built into the fibers and uses specialized knit construction with both hydrophobic and hydrophilic yarns for advanced control of body moisture dispersal. These patent-pending radiating knit structures keep you cooler in hot conditions and high-aerobic activities by increasing airflow to dissipate heat. Specifications for Ultimate Direction Nimbus Tees - Men's: Manufacturer: Ultimate Direction Sleeve Length: Short Sleeve Age Group: Adults Apparel Fit: Relaxed Gender: Male Application: Running Quantity: 1 Fabric/Material: 47percent Recycled Polyester/44percent Biodegradable Fibers Weight: 4.6 oz Features of Ultimate Direction Nimbus Tees - Men's Made with Polartec Delta fabric which has built-in non-chemical wicking and cooling Reflective logo to help keep you visible when running in low-light conditions UPF 20+ Hydrophilic fibers at interior of tee pull sweat away from body while hydrophobic fibers on the exterior of the tee dissipate moisture Flatlocked antichafe seams Polygiene long lasting and durable antimicrobial and antibacterial technology Made with 47percent recycled polyester and bluesign and OEKO-TEX certified fabric Package Contents: Ultimate Direction Nimbus Tees - Men's Ultimate Direction 82467921CGR-LG: Nimbus Tees - Men's Camo Green Large Ultimate Direction 82467921CGR-SM: Nimbus Tees - Men's Camo Green Small Ultimate Direction 82467921CGR-MD: Nimbus Tees - Men's Camo Green Medium Ultimate Direction 82467921CGR-XL: Nimbus Tees - Men's Camo Green Extra Large Ultimate Direction 82467921ONX-MD: Nimbus Tees - Men's Onyx Medium Ultimate Direction 82467921ONX-SM: Nimbus Tees - Men's Onyx Small Ultimate Direction 82467921ONX-XL: Nimbus Tees - Men's Onyx Extra Large Ultimate Direction 82467921ONX-LG: Nimbus Tees - Men's Onyx Large Ultimate Direction 82467924WH-XL: Nimbus Tees - Men's White XL