| RefrigiWear Lightweight Base Layer Top | Lightweight | Black | Ragg Wool/Polyester/Brushed | L. RefrigiWear Jackets | 160g 4-Way stretch base layer Stretch jersey knit with brushed lining for added comfort Flat seams for added comfort Get lightweight long underwear that packs a heavyweight punch against the cold with Lightweight Base Layers from RefrigiWear®. The Lightweight Base Layer Top can help a jacket feel 4°F to 8°F warmer, depending on your activity. The stretch jersey knit will flex to move with you while the brushed lining and flat seams keep you warm and comfortable while you... - RefrigiWear Lightweight Base Layer Top | Lightweight | Black | Ragg Wool/Polyester/Brushed | L. |