Shires Acrylic Fully Lined Half Pad in White. The Shires Acrylic Half Pad is fully lined with synthetic wool that can help keep moisture levels down as the air is able to flow between the fibres. The Half Pad is ideal for everyday use and competition wear and features a high wither design. The Acrylic Half Pad offers extra cushioning under the saddle while allowing the rider to maintain a close lower leg contact. The Half Pad offers retaining straps for security.