In 1997 Lake invented the first true winter specific cycling shoe with the MXZ300. The unique boot shape allows for us to trap warm air, which is the best insulator for any type of footwear. The MXZ304 continues to be the best of the best as the top winter specific cycling shoe of choice. Heavy duty Mountain V outsole by Vibram. This is all built on Lake’s legendary Nylon midsole that is extremely comfortable and stiff. For traction control, we use durable and grippy Vibram rubber tread for sure footing and stability. Pittard\'s WR100 Water Resistant Leather upper with Helcor Abrasion & Water Resistant Leather Protection panels makes for a durable, extremely comfortable & long lasting boot. 100% lined with Outlast temperature regulating material helps to maintain a constant foot temperature. 200gram Thinsulate Insulation from toe to heel. Thermosal Winter Insole is a 5 layer-insulating package of wicking felt, aluminum & non-crushable trapped air bubbles. New Mid Power M4 Cartridge Tongue mounted BOA dial excels in ice, dirt & other challenging environments & is designed to be easily adjusted with gloves on. Click-Fit quick release, the system makes for an easier entry & exit. Leather Over Flap with adjustable strap. Key Features:Discipline: Commute ,Cleat Compact: SPD ,Closure Type: New Mid Power M4 Cartridge Tongue mounted BOA ,Fit: Wide  ,Sole Material: Rubber ,Closure: BOA ,Outsole: Mountain V outsole by Vibram ,Upper Material: Pittard\'s WR100 Water Resistant Leather upper with Helcor Abrasion & Water Resistant .