The Swift FX For Her features dual-wall pillows that maintain a secure seal while adapting to natural movement during sleep-soft, minimalist, silicone that conforms smoothly to feminine facial contours and works well in any sleeping position; fleece strap wraps for added comfort; and additional adjustments to fit smaller sizes. This FitPack includes three pillows (ExtraSmall, Small and Medium) so you can try multiple sizes to ensure you get your best fit.