Best in 7 days
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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 1 - Jul 6
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
One Train Personalized Slim Fit Sleeveless 1st Birthday RomperChoo choo! Your little one will be the coolest conductor at their first birthday party in our One Train personalized romper. Sleeveless for maximum cuteness and slim fit for an adorable look. All aboard for fun times! Available in 6 month, 9 month, 12 month, and 18 month sizes. Also available in 2T and 3T. Romper is a full length romper. Snaps at one shoulder for easy on and off. Please note there are no snaps at the leg, to change a diaper the romper
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.1 ★★★★★
Based on 2389 reviews
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Product Reviews
★★★★★ 5
I think I could have been OK with a medium instead of a large, but still warm and comfy !!
Size: Large, Color: Dark Grey
Very Comfortable, and warm!! Cold weather in PA this winter !!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 11, 2026
★★★★★ 5
Worthy value.
Size: Large, Color: Dark Grey
Good underwear has a price.
This is definitely worth the investment. Not a heavy warm, but definitely a good cold day layer. Wore them in the house as sleeper.
They fit like spandex with a fly.
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Reviewed in the United States on February 12, 2026
★★★★★ 4
👍🏾
Size: Large, Color: Light Grey
Warm and comfy, would buy again
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 1, 2026
★★★★★ 5
Thermal underwear
Size: Large, Color: Black
this underwear its very comfortable to use under the clothing, its protect to cold and this is warmly, its perfect to this weather.
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Reviewed in the United States on January 20, 2026
★★★★★ 5
Keeps you warm with no bulk
Size: Medium, Color: Navy
Lightweight, adds a layer. Maintains your body heat. Multiple color choices
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Reviewed in the United States on February 13, 2026
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