Relatively light, they fit they’re comfortable and easy to carry or wear when you’re off the bike. Our Merino Wool™ Cap is thin enough to fit under helmets, with an updated panel construction that reduces bunching, too. We’ve also shortened the brim compared to some caps, for better upper peripheral vision without reducing the ability to block sun and rain.Construction:Winter weight Australian merino wool blend,X-Static liner,Reinforced brim,Ear flaps fold up or down.