We took your best t-shirt for a technical spin. The lightweight Sol Cool™ Jacquard Tee delivers the softness and comfort you want in a tee, but it's the xylitol in the fabric that delivers exceptional wicking and cooling, and wreaks havoc on odors. Our Sol Cool™ Icefil® knit fabric is embedded with xylitol, derived from white birch trees. When in contact with sweat, xylitol can decrease skin temperature by 5°F, and the Icefil® fabric wicks the moisture to the garment's surface. The same Icefil® treatment blocks UV rays for a UPF 50 rating, giving you more time to enjoy the sun.