Super thin, but so warm and form fitting. True to size.

These are super warm and comfortable. My husband loves them!

Great and cozy. It’s true to size. I recommend.

True to size, very comfortable and help keeps you warm

I purchased these for a gift for a friend. They said these bottoms were very nice and comfortable. They are soft and kept him warm.

Great value, great quality, great packaging, great product, item described as posted, prompt delivery, great service, fits perfectly

They are not made of 100 percent cotton ,they don't keep anything warm ,I ride motorcycles all year long I expected 100 percent cotton , I won't buy them again ever

I have a few pair of these which when I bought them they were made with 43% polyester 32% acrylic 21% rayon 4% spandex Now they are made different and they suck.

Bought these last year and while they are good for a thin base layer, make sure you have safety pins - I wear them under my overalls and the waist falls down around my knees! The elastic in the waistband isn't much good.

I don't know how cold it is for the zero ratings. I live in semi-cold weather here in Texas, and I am impressed that I didn't need a coat when it became 28 degrees. I had on three shirts and these free country under my jeans, and I didn't feel the chill at all, nor was I wearing a coat getting in and out of my vehicle whilst shopping. I almost forgot I had them on; they clung to me so well. I chose xxl . I approve of these because, although I'd prefer 100% cotton, these days it's half cotton and something else, so i decided to give these a try.