The Gel-Eze Wither Relief Non-Slip saddle pad has a contoured shape and and beveled edges to fit comfortably under your saddle. Even with a properly fitting saddle and quality saddle pad, slippage can occur, especially if your horse is a big mover or you're jumping. The Gel-Eze pad helps prevent saddle movement so you and your saddle stay centered. Sticky gel absorbs shock and keeps your saddle in place. Perforated to allow airflow. Non-toxic, washable, and durably reusable. This Gel-Eze Saddle Pad measures 19" x 14.5" across at the center, 16" across at the rear. There is a 4.75" long and 2" wide cutout at the spine in the center of the pad. This Gel-Eze pad measures 1/4" thick.