Hard Fiber sheet Frame at all the sides of case means it is too sturdy that it cannot fold
Ideal For Flight Travel (Flight Case), Perfectly Suitable for YAMAHA PSR-I455, PSR-I425, PSR-I500 Keyboard/Synthesizer & of Similar Internal Dimensions
Thick Padding Inside, 2 Outer Pocket to keep Accessories
Back Padded Shoulder Strap (Pithu) to Easily Carry