MAXIMUM ADAPTABILITY: Compatible with ResMed AirFit F20 Full-face CPAP Mask, Headgear Strap Replacement Set includes two premium quality straps designed to provide maximum durability and adaptability.PREMIUM QUALITY: We use ultra-soft premium elastic Nylon fabric, and smooth stitching for a durable replacement product that is tested to give you the results you deserve.GREAT VALUE: Original name brand straps are expensive and need to be replaced after a few months. replacement straps are specifically designed for ResMed AirFit F20 to offer equal functionality at a greater value.EASY CARE: Hand-wash every week using CPAP Pre-Wash Solution or a mild soap, rinse with warm water, and let hang-dry away from direct sun light. For optimal fit and mask seal, headgear straps should be replaced every three months.