I ordered these for my son. We live CA in area where we can dip into the low 20's but for the most part the winter stays around 50's. The fleece is on the outside. They are very soft. My son would be considered a small but I ordered a medium and they fit just right. A small would be not been comfy. I would consider these a medium thickness. If you live in really cold weather you might find them too thin for going outside. I plan on buying him more of these. The brand is Cheetah. I have no idea why the seller implies that the name of the brand is Alki'i.