Building on our tried and true warmer 100 polyester thermal fleece fabric weve added our favorite tech details to make this jersey ready for regular use through the fall and early winter the cross wrap wrist closures with the double layer collar and zen zipper protector all add extra comfort while the bonded fabric around the waist helps keep the pockets in place even when fully loadedwarmer fleece fabric for warmth with excellent moisture managementbonded 2 layer fabric around collar cuf