Have Met CPSC,ASTM, EN14210 standards: Our protection layers consist of anti-scratch extra hard PVC shell for hard protection, padded with soft EVA material for impact buffering. CRZKO protection gears allow our children to play hard while they are well protected..Adjustable Size: S size suitable for age 3-8 and 33-44 lbs(15-20kg) children. M size suitable for age 7-15 and 44 and 77 lbs(20-35kg) children.The adjustable Velcro straps ensure freedom of movement when doing sports.Please check our size chart in the detail page carefully..Breathable and Soft Touch: Breathable fabric liner and mesh surface design provide a breathable and comfortable wrapping..Easy-carry Bag: There are 2 knee pads, 2 elbow pads, 2 wrist pads, and one mesh carry bag in our whole set package..Professional Brand: We are devoted to being professional sport protective gear brand and will do our best to meet all the needs of our customers.