Description of Keen San Antonio The San Antonio is a progressive shoe that moves past The Austin styling. It is a less conservative BLVD shoe that uses Direct-inject molding, and the upper features Waterproof Material. Features: Upper: Leather Weight: 15.305 oz / 434 grams Lining: Leather Rubber: Direct Inject PU outsole Leather upper Leather lining Direct Inject PU midsole and outsole