The Rosko was built to surpass all your boot expectations, it’s been purpose-engineered to be a noted overachiever in K2’s collection. The H4 Coiler BOA Fit System uses stainless steel BOA laces to provide a secure closure with an effortless twist of a dial. The integrated Intuition Comfort Foam 3D liner naturally forms to the shape of your foot and is constructed with internal J-bars to hug and cushion your ankles. Heat-moldable liner with an easy-to-use Fast-In liner lacing for a premium fit. K2 ties it all together with a Phylite outsole and integrated flex zone upper cuff for grippy, lightweight, durable performance, and smooth flex over the lifetime of the boot.