Altra Lone Peak 4.0 has been given a total makeover and has now become an even more complete trail shoe. The sole has a new rubber compound MaxTrac ™ which gives better grip. The studs have different lengths and sizes, and are more movable to provide better grip on all types of substrates. Stoneguard ™ protects the foot on rough terrain and pointed stones by spreading pressure over a larger area. The upper still has the comfortable fit, but it is now also attached with a flexible strap for it to sit well over the ankle. The shoe has better drainage both at the front and the heel, as well as a new material on top of the shoe for increased durability.