Spyder loaded the Avenger Pants with winter wonder, starting with the polyester stretch twill outer that's treated with a DWR to enhance durability and shed precipitation. A waterproof Xt. L membrane is infused to keep any moisture from getting in, and taped critical seams block water at vulnerable areas. The 60g 3M Thinsulate synthetic insulation keeps his legs toasty on those cold chairlift rides. An internal waist adjustment, along with removable suspenders, lets him customize fit and layering. In case he keeps growing, as boys seem to have a habit of doing, Spyder added its Great Lengths hem system that allows the legs to extend with him.