HALYARD FLUIDSHIELD Procedure Masks Feature SO SOFT Technology - From a leader in face masks, HALYARD FLUIDSHIELD Procedure Masks are refreshingly colorful and comfy and feature an inner layer of SO SOFT bicomponent fabric technology. Facial protection is, perhaps, the most personal of choices in PPE. FLUIDSHIELD Procedure Masks represent a balance of both comfort and protection. When you're involved in any task with low fluid exposure, you'll breathe easier knowing these masks were the first to meet and exceed the new ASTM F2100-11 Level 1 standard.