Airhole Airtube Ergo AIRTUBE ERGO Ergonomic Shape POLARTEC® POWER DRY® High-quality licenced fabric MOISTURE WICKING Superior mechanical wicking for fast drying BREATHABLE Polartec® Power Dry® provides highly breathable and durable protection Polartec® Power Dry® A bi-component fabric technology is constructed with a hydrophilic interior to pull moisture away from the skin and transfer it to the outer layer. Power Dry's exterior surface area disperses and releases this moisture for more efficient dry times. Continuous evaporation prevents saturation and regulates temperature in both hot and cold conditions. FABRIC RATING Ideal for -5 to -15°C / 23 to 5°F