Core Coal Onesie
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- Inventory on the way
A sleek one-piece, a timeless essential.
The Core Coal Onesie is designed to be the foundation of every modern wardrobe. Featuring a flattering strapless tube silhouette and a sculpting second-skin fit, this all-in-one piece contours effortlessly to the body while offering comfort, confidence, and freedom of movement.
Crafted from our signature buttery-soft, breathable stretch fabric with gentle compression, it moves with you throughout the day while maintaining its shape and support. The minimalist design creates a clean, elevated look that can be styled endlessly — from Pilates sessions and wellness routines to layered city looks and effortless evenings out.
Simple, versatile, and endlessly wearable, the Core Coal Onesie is the piece you'll reach for again and again.
Available in Core Coal.
Care details:
→ Wash inside out, on a gentle setting
→ Wash on low temperature, no more than 30 degrees
→ Wash by hand if possible
→ Do not tumble dry or dry at high temperatures
→ Air dry if possible
→ Do not overload washing machine
Size Guide
| OONA | XS | S | M | L |
| UK | 6-8 | 8-10 | 10-12 | 12-14 |
| US |
2-4 | 4-6 | 6-8 | 8-10 |
| EUR | 34-36 | 36-38 | 38-40 | 40-42 |
| Bust | 67 cm | 72 cm | 77 cm | 82 cm |
| Waist | 51 cm | 56 cm | 61 cm | 66 cm |
| Hip | 66 cm | 71 cm | 76 cm | 81 cm |
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Note: Measurements are taken flat (not body circumference). If you're between sizes, we recommend sizing up for a more relaxed fit or down for a more contoured fit.
It takes 1-2 days for an order to be processed. Once the order has been handed over to the courier company, you will receive a tracking number to track your order
