The Salomon Shift Supra BOA 105 is a women's alpine-touring boot built for backcountry and sidecountry missions, with a 105 flex that balances uphill comfort and confident downhill performance. A BOA closure over the shell delivers a secure, evenly wrapped fit you can run looser than traditional buckles - so your foot won’t slip while skinning yet stays locked in for the descent. Lightweight and versatile, it’s the go-anywhere boot for skiers who want to skin farther and charge harder without sacrificing comfort.