The ultimate in temperature-control layering, the Grid Fleece 1/2-Zip is constructed with a dual-surface knitting system that incorporates high-loft grid channels for enhanced breathability and moisture management. ec2 Qwik-Dri Thermoregulation Comfort Technology. Antimicrobial-treated to help reduce odor. UPF 50+ sun protection rating. Textured grid-pattern fleece. 95% micro polyester, 5% spandex fabric. Imported.