Mizuno Volleyball Knee Pads 9" Long Intercool Vent VS-1 Superior Fit (2 Colors, 3 Sizes for Youth Club Players to Collegiate Adult Players) Mizuno 9" Top of the Line Long VS-1 Volleyball Knee Pads. Poly/Cotton/Spandex Blend with Superior Fit. Intercool Ventilation System Knee Pads Sold in Pairs of Two in 2 Colors (Black and White) 3 Sizes: Small/Youth Club Players, Medium Youth/Juniors to Large Junior/Adult High School and Collegiate Players.