My first FL purchase was the Furnace top / bottom. Oklahoma just had a cold front come in (low-mid 40s) so I decided to throw them on while I did some light work outside and I had no issue staying warm. I am looking forward to getting out in the woods in these!

Absolutely love my Furnace quarter zip it fits great, super quiet, and keeps me warm. I use the fusion pattern and love it I do a lot of my hunting from a tree stand and here in South West Ohio it can get pretty cold on the all day sits with my Furnace Quarter zip I no longer get cold or even think about getting down highly recommend this product!

First Lite has the best merino products on the market. Built to fit great, long sleeves cover your wrists without exposing your arms during movement. The best layer for warmth I've found, while being deathly quiet. The only constructive criticism is it feels a bit large through the stomach area. I'm average build and it could fit a bit tighter through the midsection.

While one of the heavier pieces I have from first lite it is extremely warm and is worth every ounce once temperatures start to drop.

This is the most comfortable and well made pullover I own. It’s extremely warm and dead silent. Will be an awesome layer come late season and wouldn’t hesitate buying it again

By far the warmest base layer I have ever use. Had them on in 40 below didn’t get cold

This quarter zip is quality all around. Heavy material to keep anyone warm in cold conditions, and fits perfectly to size. Highly recommend. Purchased an XL shirt and Large pants.

Fits outstanding with good stretch, warmest garment I have found that is still this thin. Perfect layer for under your coat when it's cold or it can be used as an outer layer in mild weather as well. Not waterproof or wind resistant which is no biggy at all.

I ordered the furnace quarter zip and bottoms for the sole purpose of having a thin manageable layer for cooler archery season mornings. Couple the kit with a camo hoodie and pants over it and the temp is just right. It's April here in Maine and the weather is comparable to our cool September mornings. I'm an athletic build at 6' and 175 lbs and the medium set was perfect fit all around, from my long arm length to torso height. The material breathes and the thumb holes are a huge bonus especially if you have a wrist strap bow release that sits on your wrist cuff. This stuff shipped super fast and arrived in great condition. Stitching is spot on and material is close to the thickness of a light hoodie. Thoroughly impressed to be 100% honest. Only thing I didn't like to see was the "Made In China" remark on the tag. I couldn't pass up trying this set though from everything I have heard about First Lite's gear. With all that being said I have yet to try this in the field and fully test its durability, BUT I will come back and edit this review if my opinion changes once I put this stuff through my hell test of mobile hunting. In my mind, worth the money thus far. Stop buying Wal-Mart long johns and get yourself a set of this stuff, you won't be disappointed. Happy hunting!

My go to for a base layer in the late season or an outer layer in the mid-season. This can be used in a number of ways and its comfortable and very warm.