Made of breathable, compressible, stretchy, high-loft Regulator fleece, the W's R2 Jacket provides superior lightweight insulation under a shell. fabric: Body: 6.1-oz Polartec Thermal Pro 98% polyester (63% recycled)/2% spandex. Side panels: 6.6-oz Polartec Power Stretch 88% polyester (60% recycled)/12% spandexKey Features of the Patagonia R2 Jacket: Huge warmth-to-weight ratio; compressible, breathable and stretchy Directional knit wicks moisture and speeds dry time Collar and chin flap lined with Polartec Power Stretch fabric (recycled polyester) for next-to-skin comfort Polartec Power Stretch fleece panels under the arms allow for a close fit, improved motion and increased durability in high-wear areas Pockets: One left chest and two zippered handwarmers Shoulder seams set forward for pack-wearing comfort |