Advanced / ExpertFlex: 5/10 Dual BOA® Fit System with H4 Coiler Tongue Dial and Internal Ankle Harness Controlled By Remote BOA® Dial PrimaLoft® insulation Contact UniLite™ Rubber Outsole Response Liner III Molded IMPACT ALG Insole BOA® Silver SS Laces Upper: Synthetic Lining: Textile Outsole: EVA