Low breathing resistance for maximum comfort. One of the easiest breathing respirators of its type, the Survivair Premier incorporates a perspiration port to reduce facepiece slippage and skin irritation.This high quality, silicone respirator includes a soft sealing flange with rolled edges for increased wearer comfort. Elastic head straps adjust at the crown for easy fit and unobstructed vision. Low profile nosepiece allows for compatibility with eyewear. Lower breathing resistance than most other available models. Low breathing resistance for maximum comfort.