Scarpa's Men's Ribelle Run Kalibra ST is the perfect trail running shoe for runners looking for maximum precision & stability on soft & technical terrain. It is designed for short or medium-distance trail running & skyrunning, focused on providing a comfortable foot-wrapping fit with the Wrap 360 lacing system. The Wrap 360 lacing system, developed with Boa, allows for a complete & micro-adjustable fit, both in the forefoot & heel. Working with the Sock Fit construction, it is quick & easy to put on, take off, & adjust on the move. A durable rand protects from rocks & abrasion while on the trail. Underfoot, the outsole boasts a soft ground-specific lug pattern with 5mm lugs to provide high grip & lateral stability.