Leather. Watch straps are most often made of leather. You can distinguish many of its species that affect the price and prestige of the bar. The most prestigious ones are alligator or crocodile leather. Very often, manufacturers additionally sew a selected leather strap. Thanks to this, the belt has the same texture along its entire length. (if the skin is not selected, the envelope usually has a different texture than when fastened). Belts are also made of ostrich, rays, snake and lizard skin.