Researchers at Japanese brand CW-X found that compressing muscles to reduce jiggling during activity actually lessens fatigue. Whereas Opedix garments (above) use strategically placed compression bands to keep joints aligned, CW-X uses similar bands to quiet vibrating muscles. Three-quarter-length tights make perfect sense for skiers: There’s no extra fabric or seams to bunch at your boot cuffs. [$82 for the top, $98 for the bottoms; cw-x.com]