Fittinga)Hold the mask in hand with nose clip at your fingertipsb)Pull the head harness behind to ears, attach the head harness to the retaining clip, improve comfort and prevent leakage. c)Note: The head harness on the same side should cross above and below the ear respectively.d)Ensure the nose clip is securely moulded around the nose, resting the ends against the cheek to obtain a good seale)To check for proper fit, cup both hands over the mask and exhale vigorously. If air leaks around the nose, tighten the nose clip, if air leaks around the edge, reposition the head harness for better fit.f)Repeat adjustments until the mask is sealed properly.g)Entry into a contaminated area with an improper fitting mask may result in illness or death.