| Base Layer | Wrapping your body in warmth. This is your next to skin layer of protection. Relaxed Fit | For that like it loose, a more relaxed fitting garment. Fabric | 100% microfiber polyester Finish | Lightly sueded peach finish for softness and warmth UPF Rtating 30+ | Ultra-violet Protection Factor – a rating system that measures the UV protection of which is provided by the fabric. Similar to the SPF rating system used in sunscreens. | Features Silky feel mid-weight base layer, Flat seam sewing for superior seam strength, Anatomically designed shape fit without excess bulk, Plush back elastic waistband in bottoms, UPF rating of 30+, Warmth Factor = 7 |