Masterline Trick Ski SleeveMasterline Trick Ski Sleeve The Masterline Trick Ski Sleeve is a neoprene trick ski cover that slips over the ski to protect the edges and base in transit and storage. Neoprene construction adds a soft, abrasion resistant layer without the bulk of a padded roller bag. The sleeve is the lighter, lower cost option compared with a full padded cover useful for short trips, in car storage, or stacking inside a larger gear bag.