The Mansfield provides warmth and is wind and water resistant without the layers. The Polartec Power Shield Pro fabric combines superior levels of air permeability with a durable hydrostatic resistance that will keep you dry inside and out. The soft tightly woven fabric provides abrasion resistance without the noise of a hard shell jacket and a full fleece interior that traps air resulting in desirable warmth to weight ratio that is perfect for upland hunters. The fleece is breathable with rapid moisture transfer, and we found the fabric stretches for superior comfort and freedom of movement and is machine washable. The membrane in the middle of the jacket enables fabric to block 99 percent of the wind while allowing 1 percent of the air to circulate within the fabric for greater moisture vapor transmission, improving breathability and reducing heat stress buildup. the combination of water resistance, style, durability and breathability of the Mansfield is sure to make it a hit with upland hunters; it has already become one of our favorite lightweight jackets.