GP1 BioLeder grips use naturally tanned leather from the Allgäu region, which has unique natural properties. Ergon's meticulous craftsmanship was perfected in collaboration with renowned London leather manufacturer Quoc Pham. The original GP1 ergonomic grips set the global standard in ergonomics, comfort, materials and quality. Grips effectively counteract hand numbness, finger pain and forearm fatigue. The aluminium sleeve fixes the grip in place and prevents it from moving while riding, while allowing perfect adjustment of the grip angle. Grips are compatible with carbon handlebars. Material: leather Sleeve: aluminium Weight: 220 g Use: MTB, travel, commuting