BURLINGTON, Vt. —  A half-dozen U.S. ski resorts are joining in protests against two new lines of snowboards that feature images of Playboy models and cartoons of self-mutilation.

Smugglers' Notch in Vermont tells The Burlington Free Press newspaper it has banned employees from using the Love and Primo boards made by Burton Snowboards.

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Vail Resorts has prohibited employees of its Vail, Breckenridge, Beaver Creek and Keystone resorts in Colorado and California's Heavenly Mountain from using the Love boards or any other inappropriate, offensive or suggestive equipment while on duty.

The boards also led to a demonstration last week outside Burton's headquarters in Burlington, Vermont.

Burton CEO Laurent Potdevin says the company supports freedom of artistic expression and stands by the boards.