These additional covers use the snap buttons for attachment, if you're looking for velcro attachment covers, please visit our Shop All page! Antimicrobial & Hypoallergenic: Protects sensitive skin and fragile joints—critical for EDS, fibromyalgia, and post-operative recovery patients. Complete Module Coverage: Includes precision-fit cases for every wedge, bolster, and head cradle in your Modular Pillow system. Machine-Washable Durability: Toss in the washer to eliminate allergens, sweat, and bacteria—ensuring your therapeutic support stays clean and effective. Uninterrupted Therapy: Keep a backup set on hand so you never miss a night of support. Add this spare case set to maintain optimal hygiene and uninterrupted therapeutic support—all night, every night.