Enriched with a new design, the Altra Timp 4 maintains healthy traction and damping but gains a more energetic midsole that helps runners tackle long runs and days of trekking on the trails without feeling tired. The EgoMax outsole, which ensures excellent cushioning, and the MaxTrac outsole, with a claw-shaped grip on a variety of terrains, ensure the Timp 4 has the necessary resistance for any distance. The knitted upper is breathable .