It is light weight but i do not know how much it will protect cold. i use with my thermal wear for my son.
This thermal shirt is made of "long John" material. It's nice and looks like it should hold up to my 4 year old boy till he grows out of it.
My son loves this shirt. Good quality awesome truck print. Kmart and sears have the best clothes for boys. Good selection and awesome quality what more could you ask for? Wonderkidd is an awesome brand that we buy fequently and enjoy so much