B:MING by BEAMS Formal Dress with Collar Navy Size: 100 The collar and sleeve cuffs are removable. An alternative collar is also included. I purchased this item used, worn once, and then used it about twice. There is a stain on the inside of the sleeve cuff. For those who understand that this is a used item, thank you. Entrance ceremonies, graduation ceremonies, Shichi-Go-San (Children's Day)