The new BioKork GP-1 grip adds antibacterial and hypoallergenic properties of cork to the legendary ergonics and comfort of the GP-1. BioKork uses 40% cork, sourced from sustainable forests in Portugal, and is certified for its ecologically sound production. The inner core is plastice reinforced w/ natural fibers. The Gel in the palm section is vegetable based, and the clamp is 100% recycleable. This grip is a result of Erogn"s "GreenLab" initiative.