GVS Elipse P3 RD Half Face Mask (With Filter), SPR501 Features Compact, lightweight, and flexible design that fits perfectly on the face and provides a full field of view compatible with other protective eyewear or noise-reduction products that the user may prefer. It has a large, non-turning valve at the center, reducing respiratory resistance and keeping moisture formation inside the mask to a minimum. The lightweight, non-slip strap is adjustable in four positions for better comfort and safe use even in high humidity or wet conditions. Elipse comes in 2 sizes.