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Browse men's thermal onesies and union suits by insulation weight and fabric, zip and button closures, hooded and footless designs, and fit for layering or sleep.

Browse men's thermal onesies and union suits by insulation weight and fabric, zip and button closures, hooded and footless designs, and fit for layering or sleep.

Pick your union suit

Insulation weight?

Lightweight
Midweight
Heavyweight

Fabric?

Cotton
Waffle Knit
Fleece
Merino/Wool Blend
Synthetic/Poly

Design details?

Zip Front
Button Front
Hooded
Footless
With Feet
SuggestionsSuggestions
Show me midweight waffle-knit union suits
I want a heavyweight fleece one for cold weather
Zip-front and footless, please
Merino/wool blend options for layering
I’m not sure—what’s best for sleeping vs layering?
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