The Replacement Nasal Cushion for the Pico CPAP Mask includes one cushion available in three sizes: small/medium, large, and extra-large. The Pico CPAP Mask Nasal Cushion is made of silicone and polycarbonate, making the cushion lighter, more comfortable, and more apt to stay in place throughout the night. This product is designed to work with the Pico mask from Philips Respironics only. General Tips Section Where Do I Find the Size? The cushion size can be found on the bottom of the cushion base. It is printed in black lettering. Cushion Tips Please note that the silicone cushion is permanently attached to the clear acrylic shell. The two cannot be separated. 1104938,1104937,1104936