It makes therapy easier!The removable LiteTouch face mask is for adults or children who find it difficult using the mouthpiece, the LiteTouch masks make treatment easier. The removeable LiteTouch face mask has a soft contoured cushion that fits easily onto InnoSpire Go Portable Mesh Nebulizers; and rests gently on the face to provide a more comfortable treatment. Compatibility: The Philips Respironics LiteTouch Face Mask is designed for use exclusively with InnoSpire Go portable nebulizer. Replacement: The Philips Respironics LiteTouch Nebulizer Face Mask is recommended replacement every 12 months to maintain performance, per Instructions for Use. Sizes: Three sizes of LiteTouch Face Mask for InnoSpire Go Portable Nebulizer are available: Large (SKU# 1127875) will fit most users from age 5 to adult, Medium (SKU# 1127798) will fit most users aged 1-5 years, and Small (SKU# 1127822) will fit most users from 0-18 months. A mask adapter was included with the InnoSpire Go and is required to use this mask. If you have lost or need a new mask adapter, the item is sold separately as a replacement item here.