BOA® Snowboard Boots for Men.Features:BOA® Fit System with H4 Coiler.Foundation Unilite™ outsole.Response Liner I.Impact-ALG™ technology features a polyurethane airbag to provide superior cushioning and impact protection.BOA® Silver SS Laces.Flex Rating:6/10.Composition:Upper:Synthetic / Lining:Textile / Outsole:Eva.