Get ready to power through uphills and descents with the updated X ULTRA 4. It is as agile as a trail-running shoe but with all the stability and grip 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.

Enhanced stability

The new ADV-C Chassis targets articulations on the outer foot to optimize stability without limiting your mobility.

All-terrain grip

The Contagrip MA outsole grabs the terrain, even when its wet or slippery, giving you more control especially on descents.v

All Terrain Contagrip

Our All Terrain Contagrip is built for the widest variety of surfaces. It delivers durability & confidence on wet, dry, hard or loose surfaces.

Advanced Chassis

Advanced Chassis is a molded insert embedded in the outsole. Providing strong lateral support and reassuring protection, it also delivers optimal mobility and flexibility.

SensiFit

SensiFit cradles the foot from the midsole to the lacing system, providing a secure, snug, and virtually customized fit all around the foot.

Chevron lugs

Lug design with deep penetration and multi-directional grip, improving traction on soft surfaces like mud or loose dirt.

Anti-debris Mesh

Tight mesh that prevents debris from being trapped between your foot and the footbed.

Synthetic upper

Synthetic upper material provide great durability and protection for outdoor activities.

Textile lining

A soft, breathable lining for extreme comfort.

Lace pocket

Provides easy storage for the Quicklace lacing system.

Welded upper

Stitch-free upper construction provides a smooth, glove-like, fit and feel.

Protective mudguard

A wrap of leather, synthetic or rubber around the base of the foot that protects the lateral and medial sides of the foot

Molded OrthoLite sockliner

Molded to match the contours of your foot, this OrthoLite insole provides superior cushioning, breathability and durability, to upgrade the comfort and performance of your shoe.