The BLACK WASH FLOWER KNOT ZIP UP by Sundae School is a plain black cotton zip-up hoodie with a hood, front pockets, and a small patch pocket on the left sleeve. It features a distinctive Maehwa knot zipper pull and is displayed laid flat on a white background.

A woman with long dark hair stands in a subway car, wearing the Sundae School BLACK WASH FLOWER KNOT ZIP UP hoodie with her hands in her pockets. The hoodie features a Maehwa knot zipper pull and subtle Hangul Sundae School embroidery. A subway route map and warning sign are visible in the background.

A person with long, straight hair stands inside a subway train, facing away from the camera and gazing out the window. They are wearing Sundae School's BLACK WASH FLOWER KNOT ZIP UP hoodie, distinguished by a Maehwa knot zipper pull and subtle Hangul Sundae School embroidery on the back. A subway map and safety sign can be seen in the background.

A person dressed in all-black casual attire, featuring Sundae School's BLACK WASH FLOWER KNOT ZIP UP with Hangul embroidery and a Maehwa knot zipper pull, stands in the center of an empty subway car, facing the camera with hands in their pockets. The station sign for 116th Street is visible above the doors.

The BLACK WASH FLOWER KNOT ZIP UP by Sundae School is displayed flat with the back facing up, featuring long sleeves and ribbed cuffs and hem. This zip-up hoodie is finished with a distinctive Maehwa knot zipper pull and subtle Hangul Sundae School embroidery for a modern touch.

A close-up of the Sundae School BLACK WASH FLOWER KNOT ZIP UP showcases a black cotton zip-up hoodie with visible tags inside the collar, subtle Hangul Sundae School embroidery, and a distinctive Maehwa knot zipper pull.

Close-up of the BLACK WASH FLOWER KNOT ZIP UP by Sundae School, highlighting the black cotton fabric, zipper with a Maehwa knot pull, and drawstrings. The top of the zipper is partially open, revealing a glimpse of a white tag with black text inside the collar.

A close-up of black fabric featuring subtle, decorative black embroidered script that blends seamlessly with the material highlights the unique Hangul Sundae School embroidery on the BLACK WASH FLOWER KNOT ZIP UP hoodie by Sundae School.

Close-up of the BLACK WASH FLOWER KNOT ZIP UP by Sundae School, showcasing the black cotton sleeve with a small pocket and subtle Hangul Sundae School embroidery above the ribbed cuff, finished with an intricate Maehwa knot zipper pull.

The BLACK WASH FLOWER KNOT ZIP UP by Sundae School is a black cotton zip-up hoodie featuring a hood, front pockets, and a signature Maehwa knot zipper pull, paired with matching black sweatpants with an elastic waistband. Both pieces are laid flat against a white background.

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BLACK WASH FLOWER KNOT ZIP UP

$145

Low returns

Customer-loved

14-day return

Heavyweight warmth guaranteed with 90% duck down fill and a durable 100% nylon shell.

Internal vertical quilting creates a slimming fit, featuring multiple pockets for maximum storage.

Asymmetric tie and zipper closure inspired by the traditional Korean hanbok for silent luxury.

COMPLETE THE STYLE:

BLACK WASH WRAP SWEAT BAJI

$123

BLACK TIE GORUM BABY TEE

$45

BLACK RIBBON TIE POLO

$69

100% Cotton Sweat Jersey
Custom traditional Maehwa knot zipper pull
Hangul 'Sundae School' cursive script embroidery at the chest
Dropped shoulders, slightly cropped length, and an oversized hood
Signature stash pocket 🪡 at the sleeve
Available in Navy Wash and Black Wash
Model is 5'8 and wears a S

Our classic zip-up, upgraded with that brand-new buttery custom cotton. We stripped away the big flower embroidery from the last run and kept the real iykyk detail: a traditional Maehwa knot hanging right off the zipper pull. We added a clean cursive hangul 'Sundae School' across your heart just so they know what’s up. It’s slightly cropped, has a massive hood to hide in, and the new midweight fabric means you don't have to pack it away when the seasons change (환절기 style).

Fit Tip: Relaxed cut, unisex sizing. Men should take their usual size in tops. Women should size down if in doubt for a truer fit. Model is 5'8 and wears a S

Measurement (in)	XS	S	M	L	XL
A. Across shoulder	21.1	22.1	23.0	24.0	24.9
B. Across chest	22.4	23.6	24.8	26.0	27.2
C. Sleeve length	23.1	23.8	24.4	25.0	25.7
D. Back length	23.2	24.0	24.8	25.6	26.4

* Measured laid flat

* Unisex style

* Model is 5'8 and wears a size S

🚚 SHIPPING & DELIVERY

Free U.S. shipping on $200+.

Orders ship in 1–5 business days (Mon–Fri).

We rest on weekends + holidays to stay human.

You’ll get a tracking email when your order ships.

Due to an operational relocation, minor shipping and support delays may occur between July 15th and August 15th. We are taking every precaution to minimize disruptions. We apologize for the delay, and we thank you for your patience and understanding during this transition.

⛪️ Shipping Return Policy:

Online Returns Only: All items purchased in-store and online must be returned via our RETURN PORTAL! We do not accept physical returns or exchanges at the store.
Email Receipt Required: A valid email receipt is mandatory to initiate any return or exchange.
Shipping & Fees: Customers are responsible for return shipping costs to our warehouse. A $3.50 processing fee will be deducted from the final refund amount.
Eligibility: All standard online return/exchange eligibility rules apply.
Rejected Returns: If your item does not pass our condition inspection, it will not be accepted. You may request to have the rejected item shipped back to you at your own expense within 30 days of the rejection notice. Unclaimed items after 30 days will be responsibly discarded.

Effective May 14, 2026, our return processing fee has changed to a flat rate of $3.50. For any returns processed prior to this date, the previous 5% fee will apply.

We appreciate your patience and support as we grow. If you have any questions, our team is happy to help!

⚖️ Risk of Loss (UCC § 2-509 — in human words):

Once we hand your package to USPS/UPS/FedEx and they scan it in, they are responsible for getting it to you.

We’re a small brand — we can’t absorb carrier mistakes the way Amazon can.

If you want coverage until final delivery, please add shipping protection at checkout.

Please note that Sundae School will not be liable for any lost/stolen shipments that do not have a shipping protection.

If you purchased package protection with your order and your package is lost, you can file a claim here.

⏰ FTC SHIPPING TIMING (16 CFR § 435)

We legally must ship within the time advertised — or within 30 days if nothing is stated.

If there’s a delay, we’ll notify you + give you the option to cancel for a full refund.

📦 PACKAGE PROTECTION

Your package protection covers shipping mishaps caused by carriers during transit. It is added to all orders by default, but you may remove it on the cart page before checkout. Please note that once it is removed, we're unable to assist with any shipping-related issues.

Your package protection also includes a free return label, meaning the cost of the return shipping is covered if you choose to return or exchange your order. However, it does not cover restocking fees charged by our third-party warehouse, as these are not related to shipping mishaps, nor overrides final-sale eligibility.

If your package is lost and you purchased Package Protection with your order, please file a lost package claim here.

🕵️ MISSING OR STOLEN PACKAGES

Once a package is marked “Delivered”, our delivery obligation is complete under UCC § 2-509 & § 2-510.

If it says “Delivered” but you can’t find it:

Check with neighbors/building staff
Contact the carrier to file a claim
We’ll support with any proof they need

We cannot refund, replace, or reship delivered packages.

Lost Before Delivery:

If tracking stalls or there’s no delivery scan, please contact the carrier for a “lost package” investigation.

We’ll help with documentation.

Undeliverable Packages:

Wrong address / refused / unclaimed → you cover re-shipping.

Original shipping isn’t refundable.

💸 DAMAGED / DEFECTIVE ITEMS

First of all, we’re so sorry that your item arrived in less-than-perfect condition 😭. While we don’t currently offer repair services, we’ll do our best to make this right for you.

Please email us at counselor@sundae.school with clear photos or videos of the issue, and our team will assist you as soon as possible.

Need an extra button?

Most of our garments include extra buttons inside the item. If your item did not come with extra buttons, feel free to reach out to us and we'll be happy to help.

Lost the extra buttons or your order was delivered over a month ago? You can still request replacement buttons for a small shipping fee.

💸 PRICE MATCHING

We’ll match a lower price with store credit within 7 days of purchase if:

The item is identical (size/color)
In stock
Sold full-price at sundae.school or an authorized retailer
You provide proof (screenshot/link)

Not eligible:

Flash sales, discount codes, bundles, promos, unauthorized resellers.

Adjustments:

Issued as store credit only, per UCC § 2-209 (contract modifications require written agreement).

Once store credit is issued, the transaction becomes final sale.

🌏 INTERNATIONAL

We currently ship to U.S. and Canada only. All international orders are final sale.

If you wish to have your orders delivered to outside the U.S. and Canada, we recommend forwarders like Forward2Me.

🪩 SUMMARY OF LEGAL BACKING (so we can all sleep at night)

Topic	Governing Rule	What It Means for You
Risk of Loss	UCC § 2-509 & § 2-319	Once we give the package to carriers such as UPS/FedEx/USPS, you own the risk.
Breach Exception	UCC § 2-510	If we ship the wrong item or defective goods, risk stays with us until fixed.
Modifying Rules by Agreement	UCC § 1-302 (former § 1-102)	We can change the default rule only by written agreement.
Shipment Timing	FTC 16 CFR Part 435	We must ship within stated/30 days or notify you of delay and offer refund.