I have a 43 inch chest and ordered this in a large. It works great as a 3rd or 4th layer for my gear and fits great. For reference my first 3 layers are medium in size; fuse crew, kiln hoody, And the kryptek dalibor soft shell.

Wore this vest alot on my two hunting trips we do in northern Alberta. And I probably don't have to tell my hunting brothers and sisters to the south how extreme the weather conditions can be up here in the great white north. I wore the vest as a mid layer, and you could really feel it holding in the warmth. Very comfortable and flexible, I would highly recommend this vest to any outdoor enthusiast.

This is the best vest I’ve ever had! Very versatile for me in Oklahoma! Great for when the weather is a bit chilly in the mornings just as a outer with a light shirt and layers perfect for when the weather starts getting colder! Breaks the wind very well also! If this isn’t on me it will be in my pack just Incase!

The Kiln hoody offers a great range of temperatures it works well in on its own. Sometimes I've found its just plain comfortable to layer the sawtooth vest over top. If that means the difference between a miserable late season morning hunting turkeys or an enjoyable one communicating with birds, I'm packing this vest every time. It breathes enough that mild temperatures don't make it stuffy but it also acts as a decent windbreak to keep the heat it holds from being ripped away when the wind kicks up. The side and chest pockets offer enough storage that it's worth bringing along just for the extra carrying space if nothing else. I don't often leave the house without it, from early to late turkey season it's hard to justify not having it on.

I bought this as an early season whitetail vest. I wear my 150 or 250 baselayer with this over. I stay warm in those early michigan bow hunting mornings, fits great, feels great. I even wear it drinking beers in the garage, awesome addition if youre not much of a jacket guy.