MERRELL SIREN 3 VENT J033906 brand Merrell Contoured cork footbed conforms to Colour:Blue Combe Contoured cork footbed conforms to the shape of your foot and features pronounced arch support Insulating film of aluminum inside the base of the boot to prevent the cold from penetrating this hiker is built with Q FORM® 2 stability technology and a Vibram® Megagrip® for confidence no matter the terrain FEATURES• Mesh and TPU upper• Webbing loops for secure fit• Hyperlock™ molded TPU heel counter for security• Bellows tongue keeps debris out• M Select™ FRESH antimicrobial agents reduces shoe odor• Kinetic Fit™ Tri removable contoured EVA insole provides light support to all three arches of the foot• Q FORM™ 2 dual density midsole with heel centering technology provides gender engineered alignment and comfort• Vibram® Megagrip®• 4