Thank you for the very informative reply! Would you recommend sizing up the 97's since they will be going over the 145's? Also, if the temp did start to rise, which would you remove first?I agree with both ManyBullets and doverpack12 that 145's will probably not going to be enough depending on which pants you are wearing and how much walking vs sitting you are doing. I have both the Kuiu 145 and the older 210 zip off wool bottoms. I have large calves and the wool 210's seem tight at my calves so I rarely wear them. I have found the system that works best for me is Kuiu 145 wool zip off bottoms and 97 Peloton zip off bottoms. I can use one or both pairs depending on temp and the 97 Peloton only weights 4.5 oz. I realize it doubles the cost, but it gives me another layer and three choices. The 97 Peloton seem much warmer than the 145 Wool and I can wear them alone or over my wool. Good luck!