TÜM SİPARİŞLERDE ÜCRETSİZ TESLİMAT
Order TrackingContact
  • Women
    • Tops
      • T-Shirt
      • Top
      • Tank & Sports Bra
    • Bottoms
      • Pants
      • Leggings
      • Shorts
      • Skort
    • Outerwear
      • Bomber
      • Vest
      Underwear
      • Brief
    • Performance Technologies
      • SEAMZERO
      • FUSIONBOND
    • Collections
      • THE CITY
      • THE MOVE
      • THE COMMUTE
    • New Arrivals
      • LIFE IN MOTION
      • SEASONAL COLORS
    New Season · WomenDISCOVER
  • Men
    • Tops
      • T-Shirt
      • Shirt
    • Bottoms
      • Pants
      • Shorts
      Underwear
      • Boxer
    • Outerwear
      • Bomber
      • Coat
      • Windbreaker
      • Jacket
    • Performance Technologies
      • SEAMZERO
      • FUSIONBOND
      • COOLMAX®
    • Collections
      • THE CITY
      • THE MOVE
      • THE COMMUTE
    • New Arrivals
      • LIFE IN MOTION
      • SEASONAL COLORS
    New Season · MenDISCOVER
  • New Arrivals
  • Sale
    • Women
    • Men
  • Σ + 1
  • New Arrivals
  • Σ + 1
All WomenAll WomenAll MenAll Men
Order TrackingContact

Frequently Asked Questions

Answers to the questions we hear most often about ordering, delivery, returns, sizing and our fabric technologies. If you cannot find what you are looking for, write to us at [email protected].

Orders and Payment

Can I order without creating an account?

Yes. An account is not required; you can complete your order as a guest. With an account you can manage your order history, addresses and favourite products in one place.

Which payment methods can I use?

You can pay by credit card, debit card or bank transfer. All options available for your order are listed at checkout.

Are my card details safe?

Yes. The card details you enter at checkout are neither visible to nor stored by us; they are processed directly through the secure infrastructure of a licensed payment institution.

Can I cancel or change my order?

If you reach us before your order is handed to the carrier, we can cancel it or correct the address. Orders already dispatched cannot be cancelled; you may use your right of return once you receive the product.

How do I get my invoice?

Your invoice is sent to the e-mail address you provided with your order. If you send a return, including a copy of the invoice in the parcel speeds up the process.

Shipping and Delivery

When is my order dispatched?

Orders placed by 14:30 on business days are handed over to the carrier the same day. Orders placed after 14:30 are prepared on the next business day.

When will my order arrive?

After dispatch, delivery by our contracted carrier is completed within 1-3 business days. In remote districts this may take longer, depending on the carrier's distribution schedule.

How much is shipping?

The shipping fee is calculated at checkout based on your cart total and delivery address. The current free shipping threshold is shown in your cart; once your cart reaches it, the fee is automatically set to zero.

Do you ship internationally?

We currently ship within Türkiye only.

How do I track my order?

Your tracking number is e-mailed to you when the order is dispatched. Account holders can track from the My Orders page; guests can use the Order Tracking page with their order number and e-mail address.

My parcel arrived damaged, what should I do?

If the box is dented, torn or wet, do not accept the parcel and have a Damage Detection Report prepared with the courier. Send the report and any photographs to [email protected] and we will start the exchange or refund process.

Returns and Exchanges

How long do I have to return an item?

You may return your product within 14 days of receipt, without giving any reason.

Do you offer exchanges?

We do not currently offer direct exchanges. You can return the item whose size or colour you would like to change and place a new order.

Which products cannot be returned?

For hygiene reasons, returns are not accepted for underwear-category bottom products (briefs, boxers, etc.). For all other products, the tag must be intact and the item unused and in resaleable condition.

How do I send a return?

Use the shipping details provided to you after your return request and send it with our contracted carrier. Pack the product in its original packaging, as it reached you, and include a copy of the invoice.

When will I get my money back?

Your return is inspected once it reaches our warehouse. For parcels found compliant with the return requirements, the refund instruction is sent to your bank within 1-7 business days. How quickly it appears on your card depends on your bank.

Sizing and Product Choice

How do I choose the right size?

Every product page includes a size chart. If you are unsure, use the Find My Size tool to see the size that best matches a few of your measurements.

What is the Virtual Fitting Room?

The Virtual Fitting Room on the product page gives you an idea of how a piece will look on you. The result is a preview — we recommend basing your size choice on the size chart and the Find My Size result.

I am between two sizes, which one should I take?

Our pieces are made from body-adaptive, stretch constructions. Choose the smaller size for a closer fit and the larger one for a more relaxed wear. If you are still unsure, write to our support team for advice on that specific product.

Fabric and Care

What is SEAMZERO?

A seamless joining technology. With conventional seam lines removed, there is no friction or marking against the skin; the piece works as one uninterrupted, smooth surface.

What is FUSIONBOND?

A bonding technology that joins fabric layers without thread. Seam bulk disappears, resulting in a lighter, more durable construction that resists external elements.

What is COOLMAX®?

A moisture-management fibre developed by The LYCRA Company. Its optimised cross-section draws moisture from the skin, spreads it across the fabric surface and accelerates evaporation, keeping you cool and dry all day. COOLMAX® is a registered trademark of The LYCRA Company.

What is Rachel knit?

An advanced knitting technique in which warp yarns are looped across multiple needle beds. It gives the fabric dimensional stability: the open-stitch structure supports breathability while the piece holds its form through washing and long-term wear.

How should I wash my products?

Care instructions are printed on each product's label and those instructions take precedence. General advice: turn the item inside out and wash at 30°C on a delicate cycle, avoid fabric softener and bleach, do not tumble dry, and dry in the shade. This preserves the fabric's stretch and moisture-management performance.

Account and Contact

I forgot my password, what should I do?

Use the "Forgot password" link on the sign-in page and enter your e-mail address to request a password reset link.

How do I hear about new products and campaigns?

Leave your e-mail address in the newsletter form on the site to hear about new collections and campaigns. You can unsubscribe at any time.

How can I reach you?

  • E-mail: [email protected]
  • Telephone: 0 212 970 27 05
  • Working hours: Weekdays 09:00 - 17:30
  • FAQ
  • Shipping & Delivery
  • Returns & Exchanges
  • Contact Us
  • Distance Sales Agreement
  • Pre-Information Form
  • Privacy Policy
  • Cookie Policy
  • Personal Data Protection Notice
SUMONE

Everyday Essentials.
Performance Fabrics.

CONTACT

RETAY MAĞAZACILIK A.Ş.Cumhuriyet Mah. Eski Hadımköy Yolu34520 Büyükçekmece, İstanbul0 212 970 27 05[email protected]Weekdays · 09:00 - 17:30

SUMONE

About UsWomenMenCollectionsPerformance Technologies

HELP

Shipping & DeliveryReturns & ExchangesFrequently Asked QuestionsContact Us

LEGAL

Distance Sales AgreementPre-Information FormPrivacy PolicyCookie PolicyPersonal Data Protection Notice
© 2026 SUMONE · All rights reserved.
SUMONE-v2.9
VisaMastercard