Soft acrylic jersey shell Toasty, heat-trapping polyester fleece lining with an anti-pill, antistatic 2×2 rib keeps its shape 100% acrylic with 100% polyester lining. Hand wash. Imported Traps heat, stays neat Here’s a surefire way to stay warm this winter: don our pattern winter hat. It’s got a soft jersey shell with a 2×2 rib knit for a snug – but not tight – fit that won’t sag. And inside, it’s lined with toasty, heat-trapping fleece that’s treated to resist pilling (so it looks neat longer) and static cling. You’ll appreciate the latter when you take it off and don’t have your statically-charged hair standing every which way.