Men's Long Sleeve Knit Polo Shirt
The polo that sits between a shirt and a sweater. Knitted from a fine-gauge cotton with a soft, smooth hand, it has the structure to look sharp and the ease to wear all day. Where the dress shirt is your formal piece, this is the smart-casual one: polished enough for the office, relaxed enough for the weekend.
Fabric and feel
- Fine-gauge knit cotton, soft and smooth against the skin
- Breathable with natural give and good recovery, so it moves with you
- Knit to hold its shape and resist bagging at the elbows and hem
Cut and construction
- Tailored knit fit that follows the body cleanly without clinging
- Ribbed polo collar that stands neat and holds its line
- Three-button placket with subtle tonal buttons
- Ribbed cuffs and hem for a structured, finished edge
- Clean, flat seams throughout for comfort and durability
Three colors, three moods
- Navy: the anchor. Sharp under a blazer, easy on its own, works with everything.
- Stone: the quiet one. A warm neutral that leans into the understated, off-duty look.
- Charcoal: the modern one. Clean and versatile, dresses up or down without effort.
Styling Wear it under a tailored jacket for smart-casual, or solo with chinos, trousers, or clean denim. The kind of piece that carries a full day without trying.
Fit and care
- True to size with a tailored knit cut. Prefer a looser feel? Size up.
- Machine washable. Wash cold, reshape, and lay flat to dry to keep the knit crisp.
Shipping & Delivery
Flat $6.99 shipping on every order, within the United States only. Orders are processed in 0 to 2 business days and typically arrive within 4 to 8 business days, with tracking included.
Read the full Shipping PolicyReturns & Refunds
You have 40 days from delivery to return unworn items in original condition with tags. Approved refunds are issued to your original payment method within 3 business days. No restocking fees.
Read the full Return & Refund PolicyWe make fewer pieces, and we make them to be kept.
What goes into every Sebastian piece, and why it is built to last.
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Chosen for the cloth
Long-staple combed cotton and dense knits, chosen to stay soft and keep their shape wash after wash.
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Considered cut
A clean, modern fit designed to drape well and sit right, on the body and off.
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Made to last
Reinforced seams, no trend gimmicks, built to stay in your rotation for years.
Clothing made to be kept, not replaced.
Atelier Sebastian started with a frustration: too much menswear is made to be thrown away. We build a small range of shirts and knits, chosen for quality you can feel and a fit that lasts beyond the season.
We take pride in every piece that carries our name. Each order is checked by hand before it ships, because the details separate something worn once from something kept for years.
Read our storyQuestions, answered.
Everything worth knowing before you order. If anything is still unclear, we are one email away.
Email care@ateliersebastian.comShipping & Delivery
At this time we ship within the United States only. We are not currently able to accept orders for delivery outside the US.
Shipping is a flat $6.99 on every order, no matter how many pieces you buy. The exact amount is always shown at checkout before you pay.
Orders are processed within 0 to 2 business days, Monday to Friday, excluding US public holidays. Orders placed before 4pm EST are, where possible, processed the same business day.
Once processed, orders typically arrive within 4 to 8 business days within the US. Delivery times are estimates and can occasionally be affected by the carrier or events outside our control.
Yes. As soon as your order is dispatched we email you a tracking number so you can follow it all the way to your door.
Read the full Shipping PolicyReturns & Refunds
You have 40 days from the delivery date to request a return.
Items must be unworn, unwashed and in their original condition with all tags still attached. We are unable to accept items that show signs of wear or washing, or damage that was not present on arrival.
Email us at care@ateliersebastian.com with your order number and the item or items you would like to return, and we will send you the return instructions.
Return shipping is arranged and paid for by the customer, unless the item arrived damaged or faulty. We recommend using a tracked service, as we cannot be responsible for returns lost in transit.
No. We do not charge restocking fees on returns.
Once your return arrives and has been inspected, approved refunds are issued to your original payment method within 3 business days. Your bank or card provider may take a little additional time to post the funds to your account.
We are sorry if that happens. Contact us at care@ateliersebastian.com within 14 days of delivery with your order number and a photo, and we will make it right at no cost to you.
To exchange for a different size or colour, the quickest way is to place a new order for the piece you want and return the original within the 40-day window.
Read the full Return & Refund PolicyOrders & Payment
We accept all major credit and debit cards, along with Apple Pay, Google Pay and Shop Pay. The available options are shown at checkout.
Yes. All payments are processed through a secure, encrypted checkout. We never see or store your full card details.
We process orders quickly, so please contact us at care@ateliersebastian.com as soon as possible. If your order has not yet been dispatched we will do our best to amend or cancel it. Once it has shipped, we are unable to make changes.
Any applicable US sales tax is calculated and displayed at checkout, based on your delivery address.
Fit & Care
Our pieces are designed to fit true to size with a clean, modern cut. For exact measurements, see the size guide on each product page.
To keep them looking their best, always follow the care instructions on the garment label. As a general guide, we suggest a gentle cool wash and reshaping while damp.
The materials for each piece are listed on its product page. Our tops are made primarily from cotton, chosen for comfort and durability.
Privacy & Your Data
We use the information you provide only to process and deliver your order, provide support, and, with your consent, send you updates. This is set out in full in our Privacy Policy.
No. We do not sell your personal information. You can request access to, or deletion of, your data at any time by contacting us.
Read the full Privacy PolicyEmail us at care@ateliersebastian.com and we will get back to you, typically within 1 to 2 business days. You can also write to us at 72 Greene Street, Suite 8, New York, NY 10012.