I not a super skater, so sometime i fall off, and hurt my knee, i lucky to have friend like Jago to put bandaid on it for me, and is blue so if it fall off in you sandwich you know it is there, if you are bad skater like me you can buy this from xstreetsl :) https://www.xstreetsl.com/modules.php?name=Marketplace&file=item&ItemID=1285768