Airhole Airtube Ergo Milk Fleece The Airtube Ergo Milk Fleece is all about softness, warmth, and comfort. Made from double-brushed Milk Fleece , this neck gaiter contours naturally to your face for a snug yet flexible fit. The ergonomic shape covers your nose, mouth, and neck without bunching, while the patented Airhole allows hot breath to escape—preventing condensation and keeping your mask dry.