7iDP Transition Kids Knee Armor. Features: Simple compression slip on fit with heat molding foam for the little rippers on scoot bikes and pedal bikes Breathable mesh back panel to wick moisture away from the skin Designed beyond CE EN1621/1 standards Sizing fitment by age: S (2-4 years), M (5-7 years) and L (8-10 years) Specs: Color:black Size:medium