Philips Respironics DreamWear Nasal Cushion | DreamWear Mask Cushions | The unique design of the DreamWear Mask makes the cushions an important part of use. To insure the right cushion size, hold the sizing gauge horizontally under the nose and select the cushion size based on where the outer edge of the nostrils and tip of the nose contact the gauge. The cushion opening will be directly under the nostrils. The cushion will hug the nose and leak will be minimal. The cushions provide added comfort and prevent any nostril irritation while in use.