The women's KILPI GUUS-W insulated jacket is made of a material called SIBERIUM DWR WB, which has been developed to protect against the cold and frost. The jacket will keep you warm with a duck feather filling at a ratio of 90/10, and it is ultra light and you won't even feel it on. The jacket has two zippered front pockets and an adjustable hood. The sleeves are adjustable with Velcro and the lower hem is elasticised. The GUUS jacket will keep you cold free and toasty in the high mountains or during chilly nature walks.