Info från tilverkaren:

SPS (Sideway Protection System) is fiberglass-inlay worked
into the cloth of the bag, which provides overall protection to
the instrument. Besides the highly compressed, 20mm high
foam-linning , the SPS-system guarantees perfect protection against
shocks and other external hazards.

* SPS®-system
* Padded plywood support in the bell area
* Accessory/music sheet pocket, wide carrying strap
* Permanently attached, adjustable deluxe rucksack straps with
  new quick stow system (GEWA System)
* Strap pocket also usable as music sheet pocket