The Gator 18 x 16" Bass Drum Protechtor Case; Elite Air Series is a hard, polyethylene case that is designed to securely guard your expensive Base drum during transport or storage. This unique case features 6 strips of foam on the top and bottom that protect your drum when stored. The Elite is constructed in such a way that the drum never touches sides of the case when inserted. It is cushioned by nothing more than air. Hence, the name "Air Case".