If you, like us, love challenging trails La Sportiva's Ultra Raptor II is one of the most durable trail running shoes available which we know. Popular with runners and hikers they combine protection Stability and grip with TPU foot support as well as TPU lacing and heel stabilizer that lock our feet and ankles in place and reinforce the synthetic mesh upper for added protection. Frixion outsoles excel in difficult terrain with 4-thick lugs.5mm and grippy rubber that sticks to single track and scree allowing us to overcome the tracks who tear up a lot of other people's running shoes. These wide dimensions allow most of us to enjoy Sportiva's most durable trail running shoe.