The Merrell Wilderness is a legend in leather. With proper care and maintenance, the Wilderness will perform for many years. Norwegian welt construction puts a wide platform underfoot for stability and can be re soled. One piece, top grain leather upper with bellows tongue showcases Italian craftsmanship. Original Wilderness model Norwegian Welt Construction creates a classic, durable sole that can be re soled seam sealant sold separately Full grain leather upper waterproof sealant sold separately Bellows tongue keeps debris out Italian metal hardware Tesivel 3 bar knit lining Dual density footbed Microporous rubber midsole 5mm LeatherTPR Insole Crampon Compatible Strap on Only Vibram Roccia Block SoleTrek Rubber Weight: 3 lbs 8 ozs. J01015 While specifically designed for durability, the premium leather and Norwegian welt construction of the Wilderness requires periodic applications of welt and leather sealant, sold separately.