Men. X ULTRA 4 MID GTX. L41293400. Men’s Hiking Boots. Agile on the way up, stable and grippy on the way down. Get ready to power through uphills and descents with this mid-cut GORE-TEX version of the updated X-ULTRA 4. It is as agile as a trail-running shoe but with all the stability, grip and waterproof protection you need to tackle technical terrain. Equipped with a new chassis, the shoe is even better at protecting sensitive articulations without compromising freedom of movement. Trail-inspired agility. Drawing on our trail-running expertise, this shoe is lighter and more agile, so you stay nimble on uneven terrain.