they're pretty good. i run cold and usually double up on base layers. i got these thinking i'd loose a layer... i haven't. but, they're really comfortable, super comfy and i love those factors, so i'm keeping them. could be cheaper.
love this burton base layer! it's a heavier, but soft texture that feels great against the skin and keeps me warm. i run colder than average and need thin layers that work at keeping me toasty without adding bulk. sizes run a little big.