The upper is constructed from full-grain SPR leather, far stronger and more abrasion resistant than traditional leathers. With cooling fibers in the mesh lining to keep your feet comfortable, this boot is made for an active individual in mind. The removable AMP LT insole is constructed with a cushioning memory foam over a PU base, providing your foot with all day comfort and support. The rubber shell is waterproof and joined to the oil and slip resistant rubber outsole through a vulcanized construction, so no worrying about damp conditions ruining your day.