Troy lee designs youth speed knee sleevethe speed knee sleeve is a full length sleeve with silicone grippers for flexibility and comfort to further aid comfort the knee sleeve is seamless d30 protection remains supple with movement but strong with a hard impact features 4mm d3or padding insert increased performance advantage over 10mm hdpe foam 360 degree seamless construction for comfort durable abrasion resistant cover reflective print logos silicone gripper bandbuytroy lee designs pro