Best Sellers, Cliff Keen The "Cliff Keen Signature" 4-strap FOAM headgear is based on the revolutionary design of the original foam E41 that Cliff Keen patented over 50 years ago. The "Signature's" VNF foam boasts these same qualities that make it the best-selling ear guard of all time: Lightweight, more comfortable fit and greatly reduced friction on the mat. Fully adjustable. Can be adjusted to fit youth sizes too. The CE58 features your choice of pad and strap color, use the uniform builder to see all color options.