Knee Pads - Valken Impact-M Closed cell foam provides the backbone of the padding as a durable shock absorber, followed by a generous area of open cell foam that provides comfort and protection We added padding on the sides of the body to protect the sides of your knees as well Kevlar outer can take all the diving and sliding you can dish Anatomically pre curved to correctly fit your body Flat lock stitching throughout prevents irritation and snags