OLLOV Marathon is a new model in polyurethane developed for the horses working on hard surfaces such as asphalt, cobblestone, requiring extra durability. The shoe has a 6mm steel shoe in the core and 9mm polyurethane for great durability. This model is lighter than ollov DuraStep and is easy to shape and work with for farriers. Farrier needs to deepen the nails but it can be done with several common farrier tools such as a dorn.