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The perfect choice for moderate to ultra distance runs.
The most cushioned offering in the Spin family, designed for long distance trail running and ultra-racing.
A global best-selling boot for skimo racers and mountaineering training, the Alien 1.0 has the durability, functionality and weight savings you need from racing boots.
Dial in the perfect fit and tackle the rockiest terrain with BOA® lacing and a PRESA® outsole.