This jersey is super warm and comfortable. It wicks well and it's smartwool so if it gets a little damp it still stays warm. I wore this in 40's and 50's temps on it's own or with a very thin baselayer and stayed warm. And it's Castelli so you know the quality is great. Euro fit so make sure to size up. Buy this during the warmer months for a deal and you'll be so glad you did when the temps drop!