GVS SPR457 Elipse P100 Half Mask Respirator, Medium and Large Compact, lightweight and flexible design 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.Temperature	-5C +55C; - 23F to 131F 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