Rainn

Bamboo Short Zipp Romper - Cosmic

$31.00 USD

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Shipping calculated at checkout.

Size 0/3M 3/6M 6/12M 12/18M 18/24M 2T

Between sizes? We recommend sizing up.

Size guide

Size Guide

Sizing varies by brand. Each brand uses its own measurements, and some styles run large or small. For the most accurate fit, check the size chart and sizing notes on each product page before you order.

How to measure

Height: measure from the top of the head to the heels, standing (or lying flat for babies).
Weight: use your child's most recent weight.
If your child is between sizes, we recommend choosing the larger size for room to grow.

General baby & toddler size reference (inches)

Use this chart as a starting point only. Always defer to the brand's own size chart on the product page.

Size	Height (in)	Weight (lb)
Newborn / 0–3M	up to 24"	up to 12.5
3M / 3–6M	24–26.5"	12.5–16.5
6M / 6–9M	26.5–28.5"	16.5–20.5
9M / 9–12M	28.5–30"	20.5–24
12M / 12–18M	30–32"	24–27.5
18M / 18–24M	32–33.5"	27.5–30
24M / 2T	33.5–36"	30–32
3T	36–38.5"	32–35
4T	38.5–41"	35–39
5T	41–44"	39–44

Questions about fit? Email customercare@augustandwillow.com and we'll help you pick the right size.

Ships directly from Rainn. $7.95 shipping per brand, free on orders $125+.

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Cosmic - Short Zipp Romper 🌙⭐

Adventure starts here with our Bamboo Short Zipp Romper. This playful, sky-inspired print is filled with smiling moons, twinkling stars, cheerful planets and dreamy clouds drifting across a starlit backdrop. Designed to spark imagination, it brings the magic of the cosmos into everyday play, making it perfect for little explorers who shine as bright as the night sky.

Made from our signature RainnWeave™ bamboo blend, the Cosmic Short Zipp Romper is buttery soft, breathable and gentle on sensitive skin. The lightweight fabric naturally regulates temperature, keeping little ones cool and comfortable during warm days. With short sleeves and short legs, it’s built for outdoor adventures, backyard play and summertime snuggles. A front zipper makes outfit changes quick and stress free, while the tag-free interior ensures irritation-free comfort for even the most delicate skin.

Parents love the thoughtful details—durability that holds up wash after wash, fabric that becomes softer with time and flexibility that adapts to every wiggle, crawl and climb. Practical yet magical, it’s designed for play-filled days and cozy evenings alike.

From sunshine to starlight, the Bamboo Short Zipp Romper combines comfort, function and a spark of imagination. And with every romper helping restore vital kelp forests, your purchase supports healthier oceans for future generations.

Shipping & Delivery

This item ships directly from Rainn, separately from the rest of your order, and arrives in its own package with tracking.

Free US shipping on orders $125+. Under $125, shipping is $7.95 per brand.

Full shipping details

Returns & Exchanges

Rainn: Return unused items with tags in original packaging within 30 days of delivery. The brand provides a return label.

To start a return, email customercare@augustandwillow.com or use our contact form with your order number. We’ll confirm with the brand and send instructions. See return terms for every brand