Saddle pad from Mattes.

Classic all-round saddle pad with quilted top, and Velcro that makes it easy to attach to the saddle to prevent it from moving under the saddle. 

Measure with a tape measure how long the contact surface is on the underside of your saddle. Then add 6cm to know what the minimum length of the saddle pad should be. The measurements can vary +/- 2cm. The saddle pad may shrink about 5% in the wash in some cases.