Mueller Medi-Kit A.T.S.S. For travel and away trips, the Mueller A.T.S.S. is the ultimate regarding the organization, protection, and easy access of small and fragile items. The entire system rolls up into a compact briefcase for easy transport. Once at the destination, the A.T.S.S. is unfurled and hung vertically. Everything in the A.T.S.S. remains sorted, clean, and immediately visible within the compartments. The A.T.S.S. is constructed of Meret's famous wipe-clean infection control material and protected by the M4L Lifetime Warranty.