Smooth bamboo-viscose fabric
Smooth, breathable bamboo viscose with tagless flatlock seams — nothing scratchy against your little one's skin.
Short-Sleeve Zip Sleeper
CudlCozy Short Zip
in Under The Sea
in Under The Sea
$29.99$36.00
Save 16%
The warm-night sleeper. The same buttery 95/5 bamboo viscose as our Zippy in a short-sleeve, footless cut — made for summer rooms and kids who run warm. One zip and they’re dressed.
Pick a print — Under The Sea
2 prints
Pick a size — 0-3 months
Fits
0-3 months
100 nights to try it — returns on us.
QTY
1
Order today — ships free in the U.S. within 1–3 business days.
Bundle & save applied automatically
3+ pieces15% off
5+ pieces25% off
100-night trial
Smooth, tagless feel
Free U.S. shipping & returns
95% bamboo viscose
Shop the print
Everything in Under The Sea.
The fabric
Soft bamboo viscose built for nightly wear.
-
95% viscose from bamboo, 5% spandexFour-way stretch grows with your kid.
-
Two-way YKK zipperDiaper changes without full undressing.
-
Tagless, flatlock seamsNo itching, no chafing, no 3am protests.
-
Machine wash cold, tumble lowKeeps a smooth feel through repeat wash days.
bamboo viscose · close-up
detail · zipper
Sizing made simple
Size chart
Between sizes? Size up — the 4-way stretch gives growing room, and the 100-night trial means you can send it back if the fit isn't right.
| Size | Age | Height | Weight |
|---|---|---|---|
| 0–3M | 0–3 months | 19–23 in | 7–12 lb |
| 3–6M | 3–6 months | 23–26 in | 12–16 lb |
| 6–12M | 6–12 months | 26–29 in | 16–22 lb |
| 12–18M | 12–18 months | 29–31 in | 22–26 lb |
| 18–24M | 18–24 months | 31–33 in | 26–29 lb |
| 2T | 2 years | 33–35 in | 28–32 lb |
| 3T | 3 years | 35–38 in | 32–36 lb |
| 4T | 4 years | 38–42 in | 36–42 lb |
| 5/6 | 5–6 years | 42–48 in | 42–55 lb |
| 7/8 | 7–8 years | 48–53 in | 55–70 lb |
| 9/10 | 9–10 years | 53–58 in | 70–90 lb |
Why families trust CudlCozy
Notes from the drawer.
Two-way YKK zipper
Opens from the bottom so changes stay quick without fully undressing.
95% bamboo viscose, 5% spandex
Machine wash cold, tumble low, and keep the smooth feel in the drawer.
The CudlCozy promise
100 nights to earn the drawer.
Every piece is cut from 95/5 bamboo viscose — smooth, tagless, and made for wash after wash. If it doesn't earn its spot in the drawer, send it back free. Every piece, all 100 nights.
The pair that gets pulled from the wash and put right back on.
Common questions
Still wondering?
Answers to the questions parents ask most before their first sleeper.
Our 4-way stretch means each size fits a 6-month window. 12–18M fits most kids 22–26 lb — and the 100-night trial gives you time to be sure.
Orders ship free anywhere in the US — we hand them to the carrier within 1–3 business days, and standard delivery then takes 5–8 business days in transit (a little longer at peak season — see our shipping policy). Need it sooner? Express shipping (1–2 business days in transit) is available at checkout.
You have 100 nights to decide. If it's not the one, we'll email a prepaid return label and refund you in full — return shipping is on us. After 100 nights, sales are final.
Smooth, silky, and stretchy against skin; built for nightly wear without scratchy tags.
Every sleeper is made from smooth bamboo-viscose fabric and sewn tagless with flatlock seams, designed for gentle all-night comfort. And if it isn't right for your little one, the 100-night trial has you covered — return it for a full refund.
Pairs beautifully with
Complete the drawer.
Added — view bag