For quick and simple adjustments on the fly, the Salomon Women's S/Pro Supra BOA® X90 Ski Boots praise BOA® over buckles to provide just the right fit and comfort for all-day enjoyment on the mountain. With dialed-up modifications only a few turns away, the BOA® Fit System Lower Closure lets you tighten or loosen your boots for a complete wrap around your forefoot. Aside from ample adaption, the BOA® X90 boots use heat molding to shape the Custom Shell HD to your foot shape in minutes. With fast adjusting and superior comfort for intermediate to advanced skiers with medium-volume feet, the Women's S/Pro Supra BOA® X90 Ski Boots will have you spending all day on the mountain free of aching feet.
SIZE CHART
| Mondopoint | US Men's/Unisex | US Women's | European |
| 22/22.5 | 4/4.5 | 5/5.5 | 3/3.5 |
| 23/23.5 | 5/5.5 | 6/6.5 | 4/4.5 |
| 24/24.5 | 6/6.5 | 7/7.5 | 5/5.5 |
| 25/25.5 | 7/7.5 | 8/8.5 | 6/6.5 |
| 26/26.5 | 8/8.5 | 9/9.5 | 7/7.5 |
| 27/27.5 | 9/9.5 | 10/10.5 | 8/8.5 |
| 28/28.5 | 10/10.5 | - | 9/9.5 |
| 29/29.5 | 11/11.5 | - | 10/10.5 |
| 30/30.5 | 12/12.5 | - | 11/11.5 |
| 31/31.5 | 13/13.5 | - | 12/12.5 |
| 32/32.5 | 14/14.5 | - | 13/13.5 |
| 33/33.5 | 15/15.5 | - | 14/14.5 |
| 34/34.5 | 16/16.5 | - | 15/15.5 |