Hightech for 2 violins 2005XL Streamlined and space-saver. Details: Outside: Shell made of the Bam Hightech technique: a triple-ply structure made of high performance materials (ABS, Airex foam or PVC foam, another type of ABS) ensuring outstanding protection and ultra-light weight. Inside: Suspension of the instruments on injected foam cushions. Colors: Inside:Black. Outside: Black carbon.