GVS SPR456 Elipse P100 Nuisance Odor Respirator, Medium/Large Compact, lightweight and flexible design ; Dimension: 3.66 x 5.04  x 4.33 (widest point) Adapts perfectly to the face and offers a full range of vision without interfering with other eye or ear protections Large central non-return valve which allows for a reduction of the user's breathing resistance and moisture build-up inside the mask to a minimum Protects against dust that can cause lung disease Lightweight, non-slip strap that is easily adjusted in 4 positions for improved comfort and to allow safe use even in high humidity or wet conditions