CE EN1077 Class B is a European safety standard for ski helmets that have soft ear pads instead of hard ear coverage. It's still a legitimate safety certification, but it tests a smaller coverage area than Class A because the soft ear sections aren't included in the impact testing.
Class B helmets are most popular with freestyle skiers and park riders who prefer the softer feel and better hearing that comes with removable ear pads. They're also generally more comfortable for all-day wear.
The trade-off is that your ears have less protection in a crash. If you're a racer, ski fast on groomers, or want maximum coverage, look for Class A instead. But if you spend most of your time in the park or prioritize comfort and style, a Class B helmet still meets recognized safety minimums and is a solid choice.