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". FEATURES Improves Gun Fit Gain Proper Eye Alignment for Shooting Accuracy Improves Shooting Comfort by Reducing Recoil 5 Fully Adjustable Hi-Density Foam Inserts 100% Neoprene with Rubber Back Built-In Swivel Stud Access for Sling Attachment Integrated 5 Shell Loops Mfg: Shooting Made Easy