KS3 - For leg guards 14.5 Inches & Larger KS3Y - For leg guards 14.5 Inches & Smaller Used to relieve the stress and pressure on the knees while in the crouched position. Designed to work with All-Star's DeltaFlex™ harness system as well as traditional elastic straps. Extra-long traditional straps are included. CLEANING: Wipe down with damp cloth to remove dust and debris.