i wear this mask while working winters on my motorcycle as a motorcop. i can tell you that it works wonders and truly does keep you warm. Being out on Interstate 95 in 75 MPH wind shear in the frigid winters is no problem at all as long as i have this hood on. It will make your glasses fog as you breath warm air up into the mask so you sometimes have to drop it just below your nose line to prevent this from happening. However, highly recommend!!! Very sturdy material and is quite comfortable. can wear it with ease under any helmet.