Mephisto - Nautic (Tan Smooth) - Mens: The Nautic is a dressier boat shoe for all you sea-faring fans. Smooth leather upper with contrast stitching has a real rich look. Deer skin / thermoregulation foam-lined uppers. Deer skin foam / latex removable footbed. Translucent Air Bag System(tm): a rubber compartment built inside the heel with a valve structure. This airbag is specially conceived and prepared to conform to the irregularities of any terrain during walking. As the shoe enters into contact with the walking surface, this airbag compresses to absorb the shock and act as a protective buffer zone for the foot. Combo Phylon / Caoutchouc rubber outsole is flexible, lightweight and designed to protect your feet from the jarring effects of walking.