All the benefits of the GC1 grip for cyclists with backwards-swept bars. But combined with Ergons bioKork technology.195g per pairWhy BioKork?The unique qualities of cork means that it is antibacterial and hypoallergenic. Corks natural damping qualities also make it an ideal grip material, and its low density mean the resulting grip is a lot lighter. The bioKork grips use 40% cork, sourced from sustainable forests in Portugal which is certified for its ecologically sound production. This ecological theme is continued throughout the rest of the grip. The inner core is plastic reinforced using natural fibre, which make up 40% of its mass. in place of mineral oil, the gel in the palm section of the grip is vegetable oil based. it is all a result of Ergons GreenLab initiative.