https://www.journals.uchicago.edu/doi/abs/10.3998/jar.0521004.0062.303
https://www.grandviewoutdoors.com/
https://carlmurawski.com/reviews/warmest-carhartt-mens-jackets-ranked/
https://www.engineeringtoolbox.com/clo-clothing-thermal-insulation-d_732.html
https://richsoil.com/electric-heat.jsp
https://en.wikipedia.org/wiki/Clothing_insulation#Clothing_ensembles_and_garments
https://www.kenilgunas.com/post/the-art-of-keeping-warm
https://www.kenilgunas.com/published-articles
https://www.carhartt.com/product/105004/super-dux-relaxed-fit-insulated-bib-overall---4-extreme-warmth-rating?colorCode=undefined_SW - $179, have sherpa lining in top section 2.36 clo
https://www.carhartt.com/product/802538/heavyweight-camo-boot-sock?categoryCode= - camo socks long
https://www.carhartt.com/product/802530/heavyweight-wool-blend-boot-sock?categoryCode= - $20 socks long
https://www.carhartt.com/product/104464/carhartt-yukon-extremes-insulated-coverall---4-extreme-warmth-rating?colorCode=undefined_SW - mens yukon coveralls 2.36 clo $249