Worldwide Shipping Available Orders are processed within 1–3 business days and shipping costs are calculated at checkout. Tracking information will be sent once your order has been dispatched.
Estimated Shipping Times Estimated delivery times vary by destination:
USA & Canada: 7–12 business days
Germany & UK: 3–9 business days
Europe: 5–12 business days
Asia Pacific: 10–20 business days
Australia: 8–15 business days
Typical delivery times are 3–12 business days, depending on the destination. Please note that actual delivery times may vary due to customs, carrier delays, or peak shipping periods.
Shipping Protection Shop with confidence — every order is covered by shipping protection from dispatch to delivery. In the event of loss or theft, we offer a full refund or complimentary reshipment.
Shop with confidence — we offer a 30-day money-back guarantee and accept returns within 30 days after delivery for eligible items that are unused, in their original packaging, with tags attached. If your item arrives damaged, defective, or incorrect, please contact us and we’ll work with you to make it right.
For quality-related issues or shipping mistakes on our side, we’ll cover the return shipping cost. Approved refunds are issued to your original payment method within 1–3 business days after inspection.
A slim-fit ribbed knit sweater with an urban edge, this piece features bold "UNDERGROUND PARIS · TOKYO 2026" lettering across the chest, a mock crew neckline, and a washed finish that gives the fabric a lived-in, textured depth. Available in black and grey, it layers effortlessly over base layers or stands alone as a statement top.
Product Highlights
Bold "UNDERGROUND" graphic lettering with double-stripe detail across the chest
Washed ribbed knit construction for a vintage, textured look
Mock crew neckline with ribbed collar for a clean, structured finish
Slim, body-skimming silhouette that flatters without restricting movement
Raglan-style shoulder seaming for a smooth, athletic fit
Available in two tonal colourways: washed black and washed grey
Fit & Styling
This sweater is cut slim through the body and arms, making it ideal as a fitted base layer under an open jacket or worn solo for a sharp, minimal look. The ribbed texture and washed tones pair naturally with dark denim, cargo trousers, or joggers. The mock crew neck sits comfortably at the base of the neck without restricting movement. Refer to the size chart — the chest measurement is a half-chest (flat lay), so double it for your actual chest circumference. If you prefer a relaxed fit, size up one.
Product Details
Material: 70% Viscose, 30% Polyester — a blend that supports the ribbed structure, soft drape, and washed surface finish visible in the product images. The sweater features long sleeves with ribbed cuffs, a ribbed hem, and a clean unlined construction throughout. Available in sizes M, L, and XL.
Size Guide
Use the measurements below as a guide and compare them with a similar item you own.
Size
Length (cm)
Chest (cm)
Sleeve (cm)
Cuff (cm)
M
58
35
72
14
L
60
37
74
14.5
XL
62
39
76
15
How to Find Your Perfect Size — Every Time
How to Find Your Perfect Size — Every Time
Struggling to pick a size online? Here's a simple trick: instead of guessing, use a piece of clothing you already own — and love the fit of — as your reference point.
Step 1: Pick Your Reference Item Think of a T-shirt you've bought before that fit you perfectly. Find that order and pull up its size chart.
Step 2: Focus on Two Key Measurements For streetwear-style tees, two numbers matter most:
Chest width— too narrow and it'll feel tight
Length— too long and it'll look sloppy
💡 Tip:Size charts sometimes list "Chest" as theflat-lay widthinstead of the full circumference. Here's how to tell the difference:
Large number(e.g., 49in / 124cm+) → likely the actual chest circumference
Small number(e.g., 24in / 62cm) → likely the flat width (garment laid flat and measured edge to edge)
Step 3: Note Your Ideal Numbers Write down the chest and length measurements from your best-fitting shirt. Care about sleeve length or shoulder width too? Note those down as well.
Step 4: Match to Our Size Chart Now check Seakoff's size chart and pick the size whose measurements are closest to your notes. That's it — no more guessing.
Works for Everything This same method applies to hoodies, sweaters, jackets, and more. Do it once, and you'll be able to shop confidently, anywhere — every time.
