Interchangeable trays for your Flex On Stirrup footbed.  Available as two options:-

GRIPP INSERT:  Plastic insert without steel tips.  Non slip, suitable for beginners and/or recreational riders or advanced riders who prefer a less grippy tread on their stirrups.

ULTRA GRIPP INSERT:  Plastic insert with steel tips.  The most popular Flex On grip available and the chosen grip of 98% of Flex On owners.  Offers maximum fixity and stability.