Supernova Xkey Protection Carrying Case The Supernova Neoprene protection carrying case is styled with trendy orange accents, two zippers that wrap around two sides of the case and offers interior foam for superior protection. Whether you're off to the studio, classroom, or just on the road, this case, ultra-lightweight and compact, will fit your Xkey 25 like a glove to protect against bumps, dust and scratches.