The Tristina Collection from Rockport turns the classic boot with a modern twist. These styles combine style and shock-absorbing ADIDPRENE by adidas technology. Features:. Full grain leather upper is easy t o clean to extend product life. ADIPRENE and ADIPRENE+ by adidas provide shock-absorbing heel cushioning and resilient forefoot cushioning. Footbed retention foam provides a durable grip on a variety of surfaces. Rubber outsole provides a durable grip on a variety of surfaces.