The Best Value You Can Find in A Full Face Piece. Honeywell Innovation, Quality and Attention to Detail Come Together in An Economically Priced Mask. Standard Features Include A Nose Cup and Wide Field Of Vision. The 5400 Easily Converts to A PAPR or Supplied Air Respirator. North® By Honeywell 54001 5400 Full Facepiece Respirator with 4-Strap Headband, M/L, Black