Originally Posted by TimothyH

Manufacturers use the term mid-layer all the time. It is a very common term, especially among hikers and alpine sports.The primary purpose of a mid layer is insulation. It is typically worn between a base layer and a shell. This type of layering system is very effective.

I don't like a heavy jacket and prefer a lighter shell on the outside. I also have several "thermal" jerseys but they don't insulate enough as a mid layer. Right now I am using an inexpensive fleece vest as a mid layer on colder nights but the fleece has lots of bulk. I was hoping someone would suggest something more technical than a fleece, something with just as much insulation, less bulk and perhaps some cycling specific features, that's all.

Apparently you are not alone in your confusion. Clearly many here have never heard of the term or don't fully understand the concept of mid layers. I hope this explained it for you and am sorry you were confused.

This whole thread is an example of how cycling has lagged far behind other sports in terms of garment technology. I am however, very glad that a simple jersey works for you.


-Tim-