The Z-BEANIE is a beanie style hat that weighs only about 1 ounce, but it will provide just as much warmth as any bulky wool or polyester fleece hat. It easily fits under any style of hat, hard hat, or helmet. The Z-BEANIE is ideal for cycling, skiing, hiking, construction work or any outdoor activity. It is constructed from exclusive MAXIT® ProMAX IV fabric and sewn with durable, FLATLOCK stitching which ensures all day comfort. Made in the USA.