YONCOZY Replacement F40 Cushion Frame for AirFit F40 Mask- Includes Medium Cushion, Frame, Snugly Fit & Reliable Seal (Small)

["Perfect fit - Designed for Small Size AirFit F40 masks, these F40 frame set provide equal functionality at an affordable price.","Comfortable- Made of premium silicone for a comfortable and consistent seal.","Easy to Use - This Small Size F40 cushion is very easy to assemble and disassemble, making them convenient to use and clean.","Durable Frame - Sturdy F40 frame prevents mask slippage, while elastic straps minimize air leaks and pressure marks for uninterrupted, comfortable sleep.","Recommend - It is recommended to replace the cushion once a month for optimal performance."]