You asked for something EXTRA….we listened and created it! Introducing the NEW Double EXTRA Dust Bee Gone Dust Mask. **Our original DBG mask has 2 layers of filter material, The DBG Double EXTRA has 4 layers of filter material PLUS ….an opening at the bottom so you can insert additional filter materials of your choosing. . Sized by men's collar size: MED~ 16 and less (also fits most women and children) LARGE~ 16-19 (fits most men) XL~ 19-26 (fits large men) +Double EXTRA+ Dust Bee Gone Nuisance Dust Mask+ dblxRegular price: $62.95Sale price: $59.95size: mediumlargeXlarge Enjoy Secure Shopping with Need help? Just ask! Dust Bee GoneTM Nuisance Dust Mask and Safety Gear Phone: 386-454-9833 Fax: 386-454-7447 1999-2021 Dust Bee GoneTM. All Rights Reserved.