It's not recommended. Bike helmets and ski helmets are designed and certified for different types of impacts, speeds, and conditions. Ski helmets provide cold-weather insulation, ear coverage, goggle compatibility, and are certified to snow-specific standards (CE EN1077 or ASTM F2040) that bike helmets do not meet. If your child skis more than a few days per season, invest in a dedicated ski helmet.
Ski Helmet · Kids/Youth Ski Helmet
Can my child use a bike helmet for skiing?
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If this answer nudged you toward a different style, these guides compare specs and trade-offs.
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