Best for skaters and working men alike (or workwear enthusiasts) are Carhartt’s Men’s Base Force Midweight Classic Crew. This men’s thermal shirt is a great base layer to wear underneath hoodies for casual outdoor activities. Once you have processed your return in the portal you're ready to post it off! Make sure you keep proof of postage!

The best all-in-one men’s thermal shirt for the casual guy is Everlane’s Waffle Long-Sleeve Crew Tee. This is the perfect, simple tee for casual outdoor brunches or the office with a flexible dress code. The 100% cotton fabric does shrink up slightly in the dryer - keep this in mind and size up one size when purchasing or hang to dry. For the gym addicts or athletes in general, Lululemon has developed its own version of a thermal with the Keep the Heat Thermal Long Sleeve Shirt. This wool-blend men’s thermal shirt is uniquely designed for running and training and can be worn out onto the streets for an effortless athleisure look. Due to the nature of the merino wool being a knit-like fabric, you may end up with some lint and fuzz without proper care. Be sure to wash under delicate cycles and occasionally shave off any wool pilling.

The compression technology is meant to improve blood circulation and reduce muscle fatigue. Still, you may feel too much of a tightening effect if you are not used to compression garments.

Bonobos is the go-to store for many men who love well-fitting wardrobe staples that will never go out of style. Their collection of classic, iconic pieces with a hint of modern elements makes them a brand with numerous repeat customers. This lightweight waffle rugby top is the perfect new rendition of the good old men’s thermal shirt. If you are an outdoorsy guy looking for a classy and practical alternative to a thermal shirt, opt for Icebreaker’s Merino 260 Tech Long Sleeve Half Zip Thermal Top. The merino wool fabric is the closest to a fine-knit sweater on this list, making it the most polished option. This men's thermal shirt is made of manufactured synthetic fabric. Although it's highly functional, this will not be for those keen to wear only cotton or organic cotton products

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The best men’s thermal shirt for the preppy guy is the Lightweight Waffle Rugby from Bonobos. This polo collared version of the waffle knit is a great addition to your closet if you are looking for something semi-formal enough to wear to a golf round or a lovely Sunday Brunch. A waffle knit gives off a more casual and relaxed vibe that some men would prefer. However, if the waffle knit aesthetic feels too old-school or preppy for you, opt for other solid options like the Uniqlo long-sleeved t-shirt or an athletic version. The wool-blend fabric will surely keep you warm during the coldest winter days, but it may start to feel a little stuffy when the weather warms up.