Made from PBT plastic-long considered the superior keycap material-this MX-compatible set is both long lasting and resistant to the shine that occurs after long hours of typing. Compared to ABS material, PBT is less common and feel textures and more more durable. It’s dry and not easy to get oily. It won’t wear down over time like ABS does. Dsa Personality PBT keycaps set has a Kit for R4 layout of any profile from 60 to fullsize mechkey.