What Reidys say... The Hightech slim offers outstanding outer protection with its tripleply outer shell (Bam's own structure made of high performance materials, ABS, Airex foam, another type of ABS) Internally it's unique suspended foam creates a protective skin for your violin.It comes with backpack style carry straps, combination locks for security, 2 bow holders and is ultra light weight, only 2.2kg,! Bam Hightech is everything you would want your violin case to be. by Ian Fielding, Reidys Violin Specialist