6.6 oz 100% polyester fleece. Thermal anti-pilling fabric provides an extra layer of warm comfort. UV Block technology keeps skin safe from the sun's harmful rays. UPF 50+. Vertical chest pocket with Callaway signature logo pull. Banded collar. Front entry pockets. Callaway signature zipper pull. Callaway Chevron heat seal on back yoke. Heat seal label provides tag-free comfort.