The women’s FIRN Jacket is a lightly insulated transitional season raincoat, featuring a feminine silhouette. RAINS constructed this coat with their signature blend of polyurethane and polyester, ultrasonically welding the seams. Lightweight 3M Thinsulate fill pads the jacket’s backside, delivering good warmth. A woven polyester lining wears comfortably against your layers. The FIRN is 4K waterproof and breathable, offering protection for light rain and snow encountered during cold weather outings in the city.