Light arch support means the sock has a subtle elastic or compression zone woven through the midfoot area. It gives your arch a gentle hug without feeling tight or restrictive — think of it as a soft embrace rather than a firm squeeze.
This level of support is the sweet spot for most skiers. The main benefit is practical: it helps the sock stay put on your foot and reduces slippage inside your boot, which means fewer hot spots and blisters over a long day on the mountain. It's less about correcting your foot mechanics and more about keeping the sock securely in place.
If you're a general resort skier who spends full days on the slopes but doesn't have specific foot fatigue issues or particularly high arches, light arch support is usually the right call. It provides just enough structure to notice, without feeling like the sock is working against your foot.