The F11KN uses the same seamless upper construction as the F11, keeping your foot in place while letting it breathe. The triple layer of extra thick nylon yarn is comfortable, breathable and doesn't hinder performance while riding. The model features a Dial Atop lacing system and has an R250 road outsole with new injected fiberglass. The outsole thus increases power transfer to the pedals. The EVA insole is moulded, breathable and removable.Weight 257 g