Women's-specific ski socks are worth seeking out if you have narrower feet or calves. They're built with a narrower heel pocket to prevent slippage, a higher arch for better support, and a smaller calf circumference so the sock doesn't bunch up inside your boot. These differences might sound minor, but inside a rigid ski boot, even small amounts of excess fabric or heel movement can lead to blisters, cold spots, and fatigue over a full day on the mountain.
If you've ever felt your heel lift inside your sock or noticed material wrinkling around your ankle or calf, a women's-specific fit could solve that. The locked-in feel is especially important for control and responsiveness while skiing. Men with narrower feet may also prefer women's sizing. Unisex socks can work in a pinch, but they're a compromise that won't give you the same precision fit.