Acavallo Spine Free Memory Foam Dressage Half padAcavallo Spine Free Memory Foam Cut back Half pad The dressage shape memory foam flat pad with shaped withers and 3D spacer spine in louvre and silicone grip is the new version of the classic Acavallo Memory Foam. This pad Absorbs shock, eliminates rubbing and friction, Gets very thin where there are already pressure points and no volume required and disperses pressure evenly.