I’m looking for a base layer that helps keep me warm when the weather is cool, but helps to keep me cool while it is warm. The only thing is that I am not at all knowledgeable about what all is available. Also, I’m really wanting more of a long-john style base layer that is all one piece.
If you can find a merino wool onesie, make sure it has elastane and polyester, otherwise the merino wool will break and rip eventually.