VENUS V-410-V Imported Surgical Mask, Safety Mask with Valve. which reduces the temperature inside the respirator by 10 F. V-410 V is IS 9473 approved. Unique Fit Adjuster for optimum protection and comfort. Superior Micro Fine Filter technology which protects against RSPM up to 0.3micron. V-410 V has no metal exposure or loose parts. Skin-friendly fabric for soft feel. Stapled outside Filter media which is leak-proof and also avoids puncture in the filter area.