As Diabase Engineering was founded by the inventor of NinjaFlex filament, the company started off with a pretty solid reputation for flexible materials right off the bat, so when they announce that they've developed a brand new flexible filament, you can be pretty sure that it's going to be of high quality. The flexible, high-strength X60 filament is the result of a collaboration between Diabase Engineering and MakeShaper, also known for their expertise in flexible 3D printing materials. According to Flexion, X60 is the softest filament on the market, with a 60 Shore A hardness - but it's also tough, with high tensile strength and abrasion resistance, and over 7x elongation at failure. Read more at 3DPrint.com: http://3dprint.com/167731/diabase-engineering-x60/