The White Sierra Ski Bib is extra convenient. In this one package, you get a waterproof ski pant as well as an insulating layer. The fleece upper provides tons of extra warmth and the waterproof lower guards against harsh weather. The Bib is insulated in the pant with 120g of synthetic for maximum warmth. Grow Cuffs provide added convenience. They can be easily lengthened when your child grows so you can squeeze in another season before getting new gear.