Petzl Back Flex are heel bails that allow you to use Petzl crampons with mountaineering or snowboard boots that don’t have heel welts
Compatible with Leopard LLF Leopard FL, Irvis Hybrid, Irvis, Vasak, Sarken, Lynx, and Dart Crampons with the Fil Flex, Fil Flex Small, or Fil Flex Wide toe bails.
Sold in pairs with fastening straps.
Materials: Stainless steel, nylon, polyester.
Weight: c 125g/pair.