The unisex Build-Up initiative comes from TNF athletes Jess Kimura & Eric Leon who want to bring snowsports clothing to the market that is accessibly priced & still built to perform. The Build-Up Pants deliver reliable performance in an on-trend track pants style. Dry Vent recycled nylon fabric is waterproof & breathable, while polyester mesh lining manages your microclimate & layers easily over long johns.