Pedi PAA-16100 violin cases are very light weight yet deliver an outstanding protection for your violin. The shells are made with synthetic polymer with excellent insulation properties. The top shell (lid) is integrated with the proprietary Steel-Shield® construction, which features a several bands of steel as a structural reinforcement to withstand a pressure of over 100lbs. The interior with 3 accessories compartments offers a plenty of storage options. Both violin and viola Oblong cases feature a very clever music pocket design, doubling as a storage to completely conceal the integrated backpack straps if you opt for carrying with a shoulder strap (included). The Niteflash™, the strategically placed reflective strips, which becomes visible to drivers, provides another layer of protection.