Drytech neck gaiters from Airhole. Drytech (85% polyester, 15% spandex) is light, wicks moisture and dries fast, and it rates Everyday, about 0 to −10°C, on our warmth scale. The Airtube Ergo is pre-curved to your face, seals out wind and stays put under a helmet and goggles with no seam across the nose. Most have laser micro-airholes and come in one size, 50–60 cm.