The myMerino® Topper is ideal for anyone who dreams of the ultimate in comfort, relaxation, health, and peaceful sleep. With 700 muscles needing to relax during sleep, myMerino Topper provides the most desirable comfort and relief from the pressure points because of its soft and supple, spring-shaped Merino wool fibers. 5-year manufacturer warranty. To ensure your new mattress topper performs its very best and lasts as long as it’s designed, we highly recommend you protect it with organic or natural cotton fitted sheet. You may spot-clean the cotton cover with a soft brush and mild detergent, allowing it to air dry completely. Regular sunning and airing of your new mattress topper will naturally revitalize and disinfect your wool bedding. 5-year manufacturer warranty.