This COS Boxy Mock Neck Dress is a minimalist wardrobe staple characterized by its oversized, structured silhouette and clean lines. Crafted from 100% cotton, this T-shirt-style dress features a raised mock neck, short sleeves, and incorporates "bonded" hems and cuffs for a seamless, elevated finish. In pristine condition size 2 (see pictures for sizing chart). COS Boxy Mock Neck Dress. It is characterized by its clean construction, minimalist aesthetic, and structured silhouette. Product Details Design: A modern, relaxed-fit dress featuring a signature mock neck and half sleeves. Construction: made from 100% cotton with folded and bonded hems and cuffs for a crisp finish. Features: includes functional side pockets.