Sure grip isis avenger quad derby skate package greythe new isis boot from sure grip is made for derbymade from 100 genuine leather uppers with a full leather stitched sole it features added additional counters and a reinforced toe for more durabilitythe newly designed power strap conforms to your foot giving you the flexibility to adjust when needed and with new wide toe box and new narrow heel cup the isis gives you the flexibility and comfort to move your feet when neededtested and appr