NinjaTek's solution for a filament with similar toughness to their flexible filaments, but with enough stiffness to be used for more structural pieces.  

It has about the same flexibility as ABS, but with much higher toughness and ease of printing.  

Extruder Temperature: 220°C 230°C
Platform Temperature: Room temperature 45°C
Glue or blue painters tape is suggested if not using a heated bed. **If using PEI or BuildTak, glue over the surface is a must to prevent damage**
Print Speed:
Top and bottom layers: 15-20 mm/ sec (900-1800 mm/ min)
Infill speeds: 45-60 mm/ sec (2700-3600 mm/ min)
Layer 2 use cooling fan if available.

Heat Deflection Temperature:  46°C