"ResMed Swift FX features dual-wall, trampoline-action pillows that maintain a secure seal while adapting to natural movement during sleep; soft minimalist, silicone headgear that conforms smoothly to facial contours and works well in any sleeping position; fleece strap wraps for added comfort; and Spring-Flex lightweight tubing to eliminate drag."

"Dual Wall Nasal Pillows.

Swift FX Nasal Pillows are designed with an inner soft wall for supreme comfort and an outer wall for added support. The cushion's base has an integrated flexible chamber that provides stability and flexibility during active sleep and at higher therapy pressures."