No-compression ski socks are perfectly fine for casual days on the mountain. They use standard elastic to stay up on your leg but don't actively squeeze or compress your calf. If you find compression socks uncomfortable or restrictive, no-compression options give you a more relaxed, familiar feel inside your boot.
The trade-off is that you won't get the circulatory benefits that graduated compression provides. Without that gentle squeeze, blood doesn't circulate as efficiently, so your feet and legs may fatigue faster on longer days. No-compression socks also tend to sag or bunch more over time, which can create hot spots or blisters.
If you're mostly doing short resort sessions or just prefer a looser feel, no-compression socks are a solid, budget-friendly choice. For all-day or multi-day skiing, you'll likely notice the difference in comfort and recovery with at least light compression.