SIZING ADVICE: FITS SMALL - Order 1 FULL SIZE Larger| Selected Size: EU 40.5, US 9 | A high-cushion, long-distance trail running shoe designed for ultramarathon runners and those who tackle rugged, technical terrain when racing or training

Features La Sportiva's proprietary XFlow Endurance midsole, a dual-foam construction. It has a super-critical nitrogen-infused eTPU core for energy return and a nitrogen-infused EVA cage that provides stability and durability. This dual-density design is intended to offer a balance of protective cushioning without feeling mushy

The outsole is made from Bi-compound FriXion XT 2.0 rubber. It features a stickier rubber compound in the forefoot for grip and a more durable compound in the heel for longevity. The 4 mm lugs are U-shaped and multi-directional, designed for traction on a variety of terrains.

The upper is constructed from Comfort Wire TPEE polyester and TPU yarn. This material provides enhanced support, structure, and durability.

The lacing system and padded heel cup are designed to provide a secure lockdown, preventing heel slip and promoting stability on uneven ground. Stack Height and Drop: 37 mm in the heel and 31 mm in the forefoot, with a 6 mm heel-to-toe drop.