Here's what other sites are saying:
Slide the Smartwool Headliner under your bike helmet and cruise comfortably in colder weather. Merino wool doesn't just keep your head warm. It regulates your head's temperature so you're neither too hot nor too cold, it dries quickly when you pick up a sweat, and it stays fresh after multiple bike rides. Flatlock seams reduce any bulk you might think you'd get with a liner under your helmet.
Smartwool NTS Mid 250 Headliner FEATURES of the Smartwool NTS Mid 250 Headliner NTS Mid 250 fabric Single layer Interlock knit construction Contoured 3 panel design with clean finish flatlock seams SPECIFICATIONS of the Smartwool NTS Mid 250 Headliner 100% Merino Wool
Material: Knit in China of 100% Merino Wool Single layer Interlock knit constructionContoured 3 panel design with clean finish flatlock seams Product Care: Machine Wash Warm Gentle CycleTumble Dry LowDo Not BleachDo Not IronDo Not Dry Clean
- River Sports Outfitters
Featuring a contoured three-panel design with flatlock stitching, this Smartwool headliner fits perfectly under most bike helmets. The thin, single layer of fabric will move moisture off your head while insulating on cooler days.