Bio Amethyst Protection Case for Far Infrared Mat - Waterproof Protector Pad - Breathable - Ultra Absorption - Ion and FIR Heat Permeable (29x73 Pro B) Amethyst mat multilayer waterproof protector pad cover White color, rectangular quilting, with elastic skirt to fix on mat Permeable for Far-Infrared Heat, PEMF and Negative Ion 29x73 Protector fits Ereada PRO Gemstone and Amethyst Mat in Rich Brown or Purple Color Non-washable, disinfect 1 hoir on high heat on mat each week, put a washable think cover or a towel on top