Specifications for Surgical Face Mask. 3 Ply Spun Bound Non woven PP. Outer layer - 25 GSM SB NW PP Middle layer - 25 GSM MELT BLOWN NW Inner layer - 25 GSM SB NW PP Loop 3 mm Round elastic with 160 mm length. Ultrasonic and laser loop welding Nose Pad 95 mm x 3 mm PE adjustable. Mask width across face 175 mm. Depth given 95 mm Actual depth 175 mm. BFE 99% Splash resistant Excellent breath ability Ultrasonic and laser loop welding. Company with ISO and CE certification. SITRA Certification