The Mayfair Button Down
The Mayfair Button Down
The Mayfair Button Down
The Mayfair Button Down
The Mayfair Button Down
The Mayfair Button Down
The Mayfair Button Down
The Mayfair Button Down
The Mayfair Button Down
The Mayfair Button Down

William is 5"11, 192lbs and wears a size M

The Mayfair Button Down

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Size Chart

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Size

William is 5"11, 192lbs and wears a size M

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DESCRIPTION

The Mayfair Button Down is crafted from premium stretch fabric that delivers lightweight comfort, breathability, and unrestricted movement. Designed with an athletic tailored fit, it creates a sharp, refined look while maintaining all-day comfort. Wrinkle-resistant and easy to care for, it's built to keep up with your lifestyle.

  • Athletic tailored fit designed to enhance the shoulders and chest while maintaining a clean, tapered silhouette
  • Premium stretch fabric delivers breathable comfort and unrestricted movement throughout the day
  • Structured collar and modern button-down design provide a polished, versatile look
  • Lightweight construction transitions effortlessly from work to travel to evenings out
  • Soft-touch performance fabric offers lasting comfort, wrinkle resistance, and shape retention

Materials & Care

  • 95% Nylon / 5% Spandex performance fabric
  • Four-way stretch for superior mobility
  • Breathable, lightweight feel
  • Wrinkle-resistant performance finish
  • Athletic fit designed for broader shoulders and a tapered waist
  • Machine wash cold and hang dry for best results

SIZE & FIT GUIDE

FIT:

Athletic tailored fit — designed to complement the shoulders and chest while maintaining a clean taper through the waist for a sharp, modern silhouette that moves comfortably with your body.

 

LENGTH:

Modern shirt length — cut to be worn tucked or untucked, offering versatile styling for the office, evenings out, travel, and everyday wear.


Most customers find The Mayfair Button Down fits true to size. We recommend selecting your usual size for the intended ONIS London fit..

 

PRO TIP:

The Mayfair Button Down is crafted from a premium stretch performance fabric designed to move with you while maintaining its structure throughout the day. Prefer a closer, tailored fit? Stay true to size. For a more relaxed feel, we recommend sizing up.

CARE INSTRUCTIONS

WASHING

  • Machine wash cold with like colors
  • Turn inside out to preserve color and fabric
  • Use mild detergent - no bleach

DRYING

  • Tumble dry low or hang dry
  • Remove promptly to prevent wrinkles

FABRIC CARE

  • Wrinkle-resistant fabric for easy maintenance
  • Designed to retain its shape and performance wear after wear
  • Avoid fabric softeners to preserve stretch and breathability

DELIVERY & RETURNS

SHIPPING:

At ONIS London, we prioritize speed and precision. Orders are processed within 24-48 hours (excluding weekends and holidays), with delivery typically arriving within 5-7 business days. Track your order every step of the way.

 

RETURNS:

We stand behind our product. If you're not completely satisfied, return within 14 days for a full refund—no questions asked. Items must be unworn, unwashed, and in original condition with tags attached.

WHY ONIS LONDON

REFINED FABRICS, BUILT TO LAST

Crafted from premium materials selected for softness, structure, and durability. Designed to maintain their fit, finish, and elevated appearance wear after wear.

 

CONSISTENT FIT & TAILORING

Precision-tailored silhouettes engineered for a reliable fit across every piece. Clean lines, balanced proportions, and effortless confidence—without the guesswork.

 

ELEVATED EVERYDAY VERSATILITY

Minimal branding and timeless design allow each piece to transition seamlessly from casual settings to refined occasions. Understated sophistication for modern daily wear.

 

LUXURY WITHOUT EXCESS

Premium craftsmanship and refined construction at an accessible price point. Exceptional quality designed for men who value standards over labels.

 

DESIGNED FOR MODERN PRESENTATION

Tailored to enhance the male silhouette with a sharp, composed fit that feels sophisticated rather than overly athletic. Built for men who appreciate refined confidence and understated elegance.

DESIGNED TO ELEVATE EVERY MOMENT

ATHLETIC TAILORED FIT

Designed to enhance the shoulders and chest while maintaining a clean, tapered silhouette.

PREMIUM STRETCH FABRIC

Delivers breathable comfort and unrestricted movement throughout the day.

STRUCTURED COLLAR & MODERN BUTTON-DOWN

A sharp, polished look that transitions seamlessly from work to weekends.

LIGHTWEIGHT CONSTRUCTION

Effortlessly goes from work to travel to evenings out.

SOFT-TOUCH PERFORMANCE

Wrinkle-resistant, easy to care for, and built to maintain its shape and comfort all day long.

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