The GT Series One allows you to swap out the grips with just a simple M3 allen key.
There are 4 grip options to choose from:
Hand covered, black, grade A goat suede leather with 0.9mm thickness
Hand covered, black, grade A smooth sheep leather with 0.9mm thickness
Hand covered, black, artificial/vegan leather (hard wearing and durable as Alcantara) with 0.9mm thickness
PLA (biodegradable thermoplastic), black, with a very grippy wood grain pattern
The grips come as a pair.