adidas Y-3 by Yohji Yamamoto Size Chart The adidas® Y-3 by Yohji Yamamoto™ Y-3 Square Label Cap is a six-panel design with a solid bill and branded patch at the front. Adjustable strap at the back. 100% cotton. Hand wash. Imported. This item may ship with an attached security tag. Merchandise returned without the original security tag attached or a damaged tag may not qualify for a refund.