The Happy Hacking Keyboard keys are manufactured from a thermoplastic engineering polymer
PBT or
Polybutylene terephthalate. It is resistant to solvents, mechanically strong and is heat resistant up to
150 degrees centigrade (perfect for you fast typers out there). Compared to ABS, PBT is highly resistant to wear, leaving it's grainy texture lasting longer. None of these properties exist with the space bar as it is
ABS.