Made of 100% neoprene with rubber back, the SME Stock Riser helps to improve shooting comfort by reducing recoil force and gun fit. It features built-in swivel stud access for sling attachment and shell loops. Includes five (5) foam inserts of various thickness for desired comfort: 1/8″, 1/4″, 3/8″, 1/2″, 5/8″.