adidas Y3 Men's Apparel Size Guide Foldable adidas® Y-3 by Yohji Yamamoto™ cap with logo at the bill. Adjustable sizer at the back. Removable clips at the back. 100% polyamide. 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.