- Quantic midsole
- Rounded heel
- Seamless upper
- Removable StoneGuard
Details: The Superior 4 takes an already lightweight, fast trail shoe and makes it even lighter. The upper has been completely redesigned in a wrap-around style for added security and support; the midsole features Altra’s proprietary Quantic foam, while the outsole is now made of our sticky MaxTrac rubber. To top it off, the rounded heel and improved lug pattern is made to fly down the trail with ease and speed.
Package Dimensions: 13.3 x 8.9 x 5.0 inches