Interior features Suspension of the instrument on injected foam cushions Inside removable accessory pouch 4 bow holders Strap for a "Kun" style shoulder rest Exterior features Shell made of the Bam Hightech technique : a tripleply structure made of high performance materials (ABS, Airex foam, another type of ABS) Outstanding protection and ultralight weight 2 comfortable neoprene antislip backpack straps with security screw hooks 2 combination locks Very comfortable bimaterial side handle Subway handle Male/female airtight seal Antislip and antiwear rubber patches on the bottom outer shell