Master Chief 2 Piece Mask Costume Accessory Includes an adult size 2 piece vacuform HALO Master Chief mask. This Master Chief 2 Piece Mask is an officially licensed Halo costume accessory. HALO Master Chief costumes sold separately. Please note: This item's color may vary due to inherent manufacturing variations or your computer monitor's color settings. The item you receive will be identical or substantially similar to the item pictured in this listing.