Is this Nike authentic?

Yes. Every CLB XXIII piece is physically inspected and authenticated by our in-house team before it is listed. We verify serial numbers, hardware, stitching, and materials by hand, and back it with a lifetime authenticity guarantee - if any item is ever proven not authentic, you receive a 100% refund with no time limit.

What condition is this item in?

Each piece is hand-graded into one of six standardized condition tiers (Pristine, Excellent, Very Good, Good, Fair, As Is). The exact grade and any included extras - box, dust bag, tags, authenticity card - are listed on the product page.

Because every piece is individually sourced under our one-of-one model, all sales are final and we do not accept change-of-mind returns. Before buying you can call us, request additional photos and measurements, or see the item in person at one of our Ohio stores. Items that arrive damaged or incorrect are resolved if reported within 48 hours of delivery.

Can I pick this up in store?

Yes. Same-day local pickup is available at our Cincinnati (Kenwood) and Beavercreek (Fairfield Commons) locations. Select your preferred option at checkout.

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Nike

Nike Dunk Low SP Undefeated 5 "On It Black"

Q: How fast does it ship?

Orders ship within 24–48 hours of purchase. Every shipment is fully insured by CLB XXIII while in transit, and higher-value pieces require a signature on delivery.

About this piece

The Nike Dunk Low Undefeated 5 On It Black, arrives with a black perforated Durabuck upper with matching suede overlays and Swooshes. Undefeated's signature tally mark insignia appears at the heel and on each woven tongue label. A dark blue, semi-translucent outsole adds a slight coloration to the triple-black design.

Style: DO9329-001
Colorway: Black/Black
Release Date: 09/08/2021

$400.00

Financing from $33.33/mo · Details at checkout

Authenticated by CLB XXIII

Verified by: CLB Lab
Location: Beavercreek, Ohio · Cincinnati, Ohio 5.0
Inquiries: Dyt@clb23.com

Size

Limited availability

Sold Out

All sales are final due to our one-of-one sourcing model. Authenticity is guaranteed for life. View policy .

MATERIAL CONDITION DISCLOSURE

Condition: New

Multi-point physical inspection by trained authenticators
Material, stitching, and tag verification
Condition graded using internal standardized criteria
Ships sealed and tracked

For your peace of mind, this piece was physically authenticated at our CLBXXIII flagship location (Beavercreek).

Processing and delivery

We aim to ship every order within 24–48 hours of purchase. Delivery times shown at checkout are estimates from the date of dispatch. In any event, orders are delivered within 30 days of us accepting your order.

Insurance and signature

Every shipment is fully insured by CLB XXIII while in transit. Select items - typically higher-value pieces - require a signature on delivery. Once the package is signed for, responsibility for the item passes to you.

If you've specified a recipient other than yourself (for example, a gift), a signature at that address is accepted as proof of delivery.

International orders

Customs, duties, and import charges are the customer's responsibility and are not included in your order total. CLB XXIII is not liable for delays caused by destination customs clearance.

Delays outside our control

If a shipment is delayed by an event outside of our control, we'll contact you as soon as possible and take steps to minimize the impact. You're also responsible for ensuring the shipping address on file is correct.

Full shipping policy →

ClientServices@clb23.com
(937)702-9011

All sales are final

Every piece we carry is individually sourced, inspected, and authenticated in-store before it's listed. Because of this one-of-one sourcing model, we do not accept change-of-mind returns or exchanges.

Please note: For the health and safety of our customers, socks, undergarments, Headware, Hats and intimates are final sale and cannot be returned.

We want you to buy with confidence - so please reach out with any questions about condition, sizing, or authenticity before placing your order. Our team can send additional photos, measurements, or detailed condition notes on request.

Authenticity guarantee

If any item is ever proven to be not authentic, you receive 100% of your money back. No time limit, no exceptions.

Every piece passes in-store authentication by our team before listing. If a third-party authenticator ever determines an item is not genuine, contact us with the documentation and we'll refund the full purchase price.

Before you buy

Call us
Walk through the item on the phone

Visit a store
See it in person at Kenwood or Fairfield Commons

Request more photos
Additional angles, details, or serial numbers

Damaged or wrong item received

If your package arrives damaged or contains the wrong item, contact us within 48 hours of delivery with photos. We'll resolve it directly.

Full return policy →

ClientServices@clb23.com
(937) 702-9011

Nike Nike Dunk Low SP Undefeated 5 "On It Black"

$400.00 or $33.33/mo

CLB XXIII

Authentication

Every item is physically inspected and authenticated by our in-house team before it is ever listed. Serial numbers, hardware, stitching, and materials all verified by hand.