The Women's Light-Weight (LT) Neckwarmer from Anon is an incredibly versatile facemask to keep you warm on slightly chilly days. MFI (Magnetic Facemask Integration) allows the facemask to be magnetically secured to the bridge of compatible Anon goggles. When MFI goggles are teamed up with MFI facemasks it creates a seamless barrier against the elements.