Soft, stretch, breathable and packable, Capilene® Thermal Weight is made from Polartec® Power Grid ™ fabric with a smooth outer that slides easily under the other layers and a brushed fleece inner to retain a core of warmth and provide breathability and comfort on the skin. It also boasts a recycled content in varying proportions (30% -92%) and is equipped with HeiQ® Fresh technology for long-lasting odor control, to make you feel comfortable at all times. The use of HeiQ® Fresh anti-odor technology results in fewer washes and longer garment life, while Fair Trade Certified ™ for the seams means that Patagonia has paid a cash bonus to the workers who made it. Product features include: slim buttonhole to hang garment to dry, fully reinforced underarm inserts for maximum freedom of movement of the shoulders, internal elastic for the thumbs that ensure hand protection, seams with flat stitch structure to reduce minimal rubbing, deviated seams on the shoulders and deviated side seams to comfortably wear the backpack, asymmetrical hem longer at the back for greater protection.