Grid fleece on the inside keeps you warmer
"The Blockfield fleece shirt is grid-fleece on the inside that keeps you really warm. It is lighter weight than cotton flannel and sheds light rain on the outside with the DWR coating. The snaps are strong on the chest pockets. There are zipped hand pockets and inside map or beanie pockets. Lots of storage space with 6 pockets. My go-to shirt jack for cooler spring weather."
