Altra's flagship ultra running shoe is back with major updates for 2020. The Olympus 4.0 features a redesigned outsole built around the idea of "independent suspension"--a split down the middle of the sole that helps the shoe absorb impacts while decreasing tilt or roll. Since the Olympus is a maximum-cushion style shoe, this feature helps decrease the chance of a rolled ankle with the extra foam underfoot. The high-traction outsole is now made of Vibram Mega, and is beefed up with more lugs for better grip. The Olympus 4.0 could be your secret weapon for running the Tahoe Rim this year!