A security zip

Mohair blend

but they only work if you buy them before you need em

Designed to sit below they waist

"II" on the heel pull tab

Bones STF Retros V3 99A 54mm protection A security zipDo your best not to break your bones when skating with the Bones STF Retros 99a V3 Slims Wheels. Manufactured with Bones Street Tech Formula, giving you more slide ability with less flat spots creating a wheel with a substantially higher rebound for more speed and amazing slide capabilities. Manufactured in the U. S. at the Bones factory in Santa Barbara, California, these wheels are skater engineered. Features: Anti flatspot urethane V3 Slim Shape