1. Universal Size Compatible with Nasal Mask Cushions.CPAP Mask Liners Compatible with ResMed AirFit N20 Nasal Masks soft thin blanket style, Absorb Oils and Moisture Reducing Facial Redness and Pressure Marks for Enhanced Comfort
2.Nasal mask liners fit most nasal masks (around the nose only) ,not fit full face cpap mask (around nose and mouth),The Comfort soft thin blanket style cpap mask liners in 3 size:large,mediun and small.his one fit Medium size N20 Nasal CPAP masks
3.The material is really soft but it absorbs some of the oil from your skin,presume helps prevent any chaffing or acne.
4.There are Which can be washed and used repeatedly Easy to be cleaned and durable.Easy to put on and clean.