Zan Headgear Neoprene Extension Piece (BLACK) The Neoprene Extension Piece can be used on any of Zan Headgear&#39;s headwear items with hook-and-loop closures, such as the Cold weather Line and the Neoprene Face Masks. Adds up to 2 extra inches to accommodate different face shapes. Measures: 1.75 x 4 inches. Sold as a 6-pack.