Portwest B173 Dynamic Air Baselayer Thermal Top

The DynamicAir Baselayer Top is a close-fitting base layer designed for professionals and active outdoor enthusiasts who demand reliable moisture management and lightweight warmth across seasons.

• Fabric composition: 65% Polyamide, 28% Polypropylene, 5% Elastane, 2% Polyester; 165 g/m² fabric weight for a breathable yet insulating layer.
• Moisture management: moisture-wicking fabric that draws sweat away from the skin and speeds its evaporation to keep you dry.
• Seamless body mapping: seamless panelling provides targeted support and enhanced breathability for all-day comfort.
• Thermal performance: offers insulation and thermal protection, making it suitable for multi-season use when layered.
• Quick-dry and cooling: designed to dry rapidly and deliver a cooling feel during activity, reducing cling and overheating.
• Style and durability: contrast colour stitching adds style while maintaining durability and a comfortable fit.
• Packaging: Retail box included to aid display and sales presentation in stores.

The Dynamic Air Baselayer Top helps you stay dry and comfortable whether you’re on a busy job site, cycling, hiking, or training. Its close fit optimizes wicking performance, so moisture moves away from the skin quickly, while the breathable fabric and ergonomic panels prevent overheating. The fabric blend balances strength and stretch—Polyamide provides structure, Polypropylene enhances moisture transfer, Elastane adds give, and Polyester contributes to durability. Use it as the first layer under workwear or outer layers to maintain warmth without bulk, and rely on fast-drying performance when you transition between activities or climates.