The Obermeyer Boy's Chill Factor Insulated Bib Pants are the perfect thing to keep the young boys warm during the winter. It is made of Stormtech V fabric and hydroblock water resistant coating, this is a tough fabric that is light weight. This bib features an adjustable waistband for a great fit. Articulated knees ensure a full range of motion. A reinforced double layer in the seat and knees ensures that this bib will stand up to the roughest play.