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ISLAND KNOCKOUT TEE BLACK is a Corteiz t-shirt in black from the brand’s UK streetwear range — designed as a everyday essential for everyday wear. Cut true to size through the body, featuring ribbed crew neckline. Available in UK sizes with £10 flat-rate delivery from cortezsuk.com.
ISLAND KNOCKOUT TEE didn’t happen by accident — it’s the kind of t-shirt that earns its place in rotation. The ribbed crew neckline does the talking, while the overall cut stays true to size through the body.
Wear it as your everyday essential: the design holds its own whether you’re dressing it up or keeping things low-key. The black colourway keeps things versatile across outfits. Signature CRTZ touches mark it as part of the UK streetwear conversation.
Care Instructions
- Machine wash cold (30°C) with like colours
- Turn inside out before washing
- Do not tumble dry unless label states otherwise
- Cool iron if needed
- Do not bleach
Size Guide
Corteiz t-shirts are cut true to size through the body. If you prefer an oversized streetwear fit, we recommend sizing up one size.
| Size | Fit Guidance |
|---|---|
| XS – S | Slimmer fit — size up for relaxed/oversized look |
| M – L | Standard fit — true to size for most builds |
| XL – XXL | Relaxed fit — already roomy, no need to size up |
UK Shipping
- Cost: £10 flat rate UK delivery
- Processing: 2–4 business days
- Transit: 5–7 business days
- Total delivery time: 7–11 business days
Returns & Refunds
- 14-day return window from delivery
- Items must be unworn, unwashed, with tags attached
- Refunds issued to original payment method
- Contact us via WhatsApp +44 7534268065 to start a return
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Frequently Asked Questions
How do I wash the ISLAND KNOCKOUT TEE?
Machine wash cold at 30°C with like colours, turned inside out. Hang dry naturally — do not tumble dry.
What is the ISLAND KNOCKOUT TEE?
The ISLAND KNOCKOUT TEE is a Corteiz t-shirt from the UK streetwear range, designed as a everyday essential. It features ribbed crew neckline and is cut true to size through the body.
How long does UK delivery take for the ISLAND KNOCKOUT TEE?
Processing takes 2–4 business days plus 5–7 business days transit. Total 7–11 business days for £10 flat rate UK delivery.
Is the ISLAND KNOCKOUT TEE suitable for everyday wear?
Yes — it’s designed as a everyday essential for daily use, not just special occasions. The construction prioritises comfort and durability.
What should I wear with the ISLAND KNOCKOUT TEE?
It works as a everyday essential. Pair it with other Corteiz pieces in a similar colourway — see related products above.
Freya V. Gibson (verified owner) –
Fantastic product. The ISLAND KNOCKOUT TEE BLACK fits perfectly and arrived fast.