Fits fine with either thermal or t-shirt under

If combined with an insulating layer, you'll be comfortable in any weather

Perfect for cycling and running

Rain resistant for a very long time

Very happy with it so far

This is a very lightweight membrane - good for keeping the rain and wind off you and, when coupled with carefully selected base layers (performance fabrics, not cotton!) will keep you warm and dry well into the low 50s/upper 40s