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The Cold Day Union Suit

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3 reviews
Color: Cardinal
Size Size Chart

Size Chart

Men Size Chart

Size Neck Chest Natural Waist
S 34 14 1/2 34 26
36 15 36 28
M 38 15 1/2 38 30
40 16 40 32
L 42 16 1/2 42 34
44 17 44 36
XL 46 17 1/2 46 38
48 18 48 40
XXL 50 18 1/2 50 42
52 19 52 44
Men Size Chart

Hat Size Chart

Size Us Hat Size Head Size (inches) European Size (cm)
S 6 3/4 21 1/4 54
6 7/8 21 5/8 55
M 7 22 56
7 1/8 22 3/8 57
L 7 1/4 22 3/4 58
7 3/8 23 1/8 59
XL 7 1/2 23 1/2 60
7 5/8 24 61
XXL 7 5/8 24 3/8 62
7 7/8 24 3/4 63
Hat  Size Chart

Wrap a measuring tape around your head. Not too tight.
Give your measurements to one of our customer service specialists or use the chart above to determine your best fit.

How to get a really good fit:
First and foremost, if you have any questions about size, call customer service at 888-436-1031. We have actual garment measurements for every item and we’ll be happy to help you find the perfect size.

Measure yourself with a tape measure using the instructions below. (Or have a friend do it. Serve sangria, as a bribe.) Jot down your measurements and compare them with the body measurement sizing charts found below
and on each product page.

HAT: Measure circumference of your head where a hat would naturally rest (normally above the brow).
WAIST: Measure around your natural waist or, if you prefer, a little lower, where you may actually wear your pants.
NECK: Measure the circumference of your neck. (Add a little for your Adam's apple.)
SEAT/HIP: Standing, with feet together, measure around the fullest part of the hips. Don't cheat.
CHEST/BUST: Measure around fullest part, but with tape under your arms.
You'll need a friend to do this for you. (More sangria.)
INSEAM: Use a well-fitting similarly styled pair of pants. Lay them flat, with seam on seam.
Measure from crotch to bottom of hem.
ARM/SLEEVE LENGTH: Your arm must be slightly bent to do this correctly. Then, measure from center back of your neck, over the shoulder, down the arm, past the elbow (slightly bent) all the way to wrist. (Your friend may be needed for this too.)
"FOR MEN AND WOMEN": What does that mean? They're men's sizes, in fact.
On women, these items will be attractively oversized; sleeve length will be long.
TALL: All of the measurements are the same as the Regular Size, but we’ve added 1” to the sleeve length and 2” to the body length.


The Cold Day Union Suit

A little-known fact about the union suit: it originated in the 19th century as part of a German movement that advocated fresh air, nudism, ‘water massages,’ and other natural therapies a good hundred years or so before the hippie era. A simpler and more straightforward way of dressing was also part of this reform agenda, for women as much as men. So, no, the famed one-piece underwear unit hasn’t always just been a way for Grizzly Adams types to keep warm in their cabins. Nor has the union suit ever been quite this comfortable, which is a main reason we’re reintroducing this throwback style for the first time in years. Ours is made of lightweight, super-soft cotton jersey; you may find yourself wearing it around the house with slippers a little later into the morning than expected, and also gladly pulling a pair of wool trousers on over it once you’ve resolved to go out. Features a ‘drop seat’ (the polite term for butt flap) and ribbed collar and cuffs. Contrast stitching. Fisheye buttons. 100% Cotton. Classic fit. Imported. Machine wash.

Customer Reviews
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30 May 2022
United States

Thank you fits great will keep me warm this winter

Thank you fits great will keep me warm this winter. Nice and heavy duty

04 February 2022
Michael G.
United States United States

Great choice

The one-piece works for me as an alternative for pajamas. It stays in place. It is warm and roomy. Great cotton fabric. The “trap door” works well.

05 January 2022
Gina C.
United States United States

Great purchase!

My husband LOVES his onsey and wants me to order more! Keeps him warm at night but not too hot.