adidas Y3 Men's Apparel Size Guide Polyester adidas® Y-3 by Yohji Yamamoto™ backpack. Top zip-around closure. Flat top handle. Dual adjustable shoulder straps with chest clip closure and key fob. Two exterior zip pockets. Brand name patch at the front. Flat base to provide upright structure. Lined interior features back-wall slip pocket for 13" laptop. 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.