6 brands, I had to try on so many different brands of thermal underwear for my son with SPD before we found them. They are PERFECT, thick, soft and warm. With other brands my son had to order a size 12/14 even though he is a size 8 so they are now transparent. I made the mistake of ordering it in that size as well and it could easily have been smaller. I can't return them because he loves them too much but I will buy more for him in the right size. It's SO AWESOME to finally find a phat pair that fits you just right. They'll keep him warm in our cold Fairbanks winter. My sons only request was that they have more flowers. He plans, to wear them regularly as soon as it gets cold here. 💜💜
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