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- Heel bails allow any type of Petzl crampon to be used with shoes without heel welts.
- BACK FLEX is a heel bail system. It allows any type of Petzl crampon to be used with shoes without heel welts. It is sold in pairs, to equip a pair of crampons.
- Compatible with crampon models:
-
- Leopard FL,
- Irvis,
- Irvis Hybrid,
- Vasak,
- Sarken,
- Dart,
- Dartwin,
- Lynx.
- Product sold in pairs, with tightening straps.