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Every piece we make is graded on a four-rung warmth ladder, from cotton jersey up to sherpa. Find your rung

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Adult Onesie, Black - Light Up
Warmest

Adult Onesie, Black - Light Up

$19.994.4 from 4,377 ratings

A full-length one piece cut in our warmest polyester fabric. We build it with an attached hood, a long front zipper, and banded ankles to keep the legs in place. Lock-stitched construction holds up through regular wear and routine machine washing.

On our ladder this one is Warmest. The top of the ladder: plush, sherpa and fleece.

ColorwayBlack - Light Up
CutOnesies
Fabric100% Polyester
Sizes listedX-Small

What it is made of

Cut and profile
We cut this one piece with a relaxed trunk and a non-footed leg. The front zipper runs deep for easy changes, while the attached hood sits comfortably over the neck without pulling back.
Seams and construction
All internal seams are lock stitched with generous allowance. That extra thread coverage helps prevent split seams around the crotch, seat, and underarms when you sit or stretch.
Size run
Our adult size chart spans from X-Small to 3X. An X-Small accommodates a 32 to 33 inch chest and a 24 inch waist, while our 3X covers up to a 52 inch chest.
Fabric and laundry
The 100 percent polyester synthetic knit goes straight into the washing machine. It resists shrinking and holds its deep black base and light-up print through repeated wash cycles.

Measured, not guessed

These are the garment measurements the maker publishes for this piece, in inches. Measure something that already fits you and compare.

SizeUSChestWaistHip
X-Small0 - 232- 332434.5- 35.5
Small4 - 634- 3526- 2736.5- 37.5
Medium8 - 1036- 3728- 2938.5- 39.5
Large12 - 1438.5- 4030.5- 3241- 42.5
X-Large16 - 1841.5- 4333.5- 3544- 45.5
XX-Large20 - 2244.5- 4636.5- 3847- 48.5
1X14W - 16W42- 4435- 3744- 46
2X18W - 20 W46- 4839- 4148- 50
3X22W - 24W50- 5243- 4552- 54

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