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A reflection of identity and intention.
The OIO | NYD — Not Yet Defined dad hat embodies simplicity, consciousness, and timeless design.
Crafted from 100% certified organic cotton, it features:
• “NYD — Not Yet Defined” embroidered across the front
• “OIO” on the back
• “OIO | NYD” embroidered on each side
Soft, sustainable, and made to last — this piece blends everyday wear with quiet meaning.
100% organic cotton
Fabric weight: 8 oz/yd² (271 g/m²)
6-panel, unstructured fit
Adjustable brass closure
Embroidered detailing on all sides
Ethically sourced and PETA-approved vegan fabric
Designed for those still Not Yet Defined.
Edition O - The Origin Series
Free worldwide shipping.
This product is made especially for you as soon as you place an order, which is why it takes us a bit longer to deliver it to you. Making products on demand instead of in bulk helps reduce overproduction, so thank you for making thoughtful purchasing decisions!
Age restrictions: For adults
EU Warranty: 2 years
Other compliance information: Meets the EU REACH requirements.
In compliance with the General Product Safety Regulation (GPSR), Oak inc. and SINDEN VENTURES LIMITED ensure that all consumer products offered are safe and meet EU standards. For any product safety related inquiries or concerns, please contact our EU representative at gpsr@sindenventures.com. You can also write to us at 123 Main Street, Anytown, Country or Markou Evgenikou 11, Mesa Geitonia, 4002, Limassol, Cyprus.
Size guide
| A (inches) | B (inches) | C (inches) | D (inches) | |
| One size | 20 ½-23 ⅝ | 4 ⅜ | 2 ¾ | 7 ⅛ |
| A (cm) | B (cm) | C (cm) | D (cm) | |
| One size | 52-60 | 11 | 7 | 18 |