Men's Smart Casual Shirt with Open Collar — Classic Long Sleeve Shirt for Business & Weekend Wear | Koossa
Free UK delivery — includes tracking
30-day money-back guarantee
Men's Smart Casual Shirt with Open Collar
Discover the understated elegance of this men's long sleeve shirt, expertly tailored for the gentleman who values both comfort and refinement. Featuring a relaxed open collar with a subtle button placket, this smart casual shirt offers effortless versatility for the office, weekend gatherings, or evening occasions. The clean, plain front design ensures timeless appeal, whilst the gently relaxed cut flatters a range of builds without sacrificing a polished silhouette. Available in seven distinguished shades — from crisp white and soft beige to calming light blue, classic black, understated grey, fresh light green, and elegant pink — this shirt is a wardrobe essential for the discerning man.
Why You'll Love It
- Open collar styling: relaxed yet refined, perfect for layering or wearing on its own.
- Long sleeves: ideal for year-round wear, easily rolled for a more casual look.
- Relaxed fit: comfortable through the body and shoulders, never restricting movement.
- Plain, unfussy design: timeless elegance that pairs effortlessly with tailored trousers or smart jeans.
- Seven versatile colourways: choose from crisp neutrals to subtle statement shades.
- Easy-care finish: designed to minimise creasing and maintain its shape wash after wash.
Perfect For
Whether you're heading to the office, meeting friends for lunch, or attending a relaxed evening event, this men's smart casual shirt delivers effortless sophistication. Pair it with chinos and brogues for a polished business-casual look, or wear it open over a quality T-shirt with dark jeans for weekend ease. The subtle stretch ensures all-day comfort, whilst the relaxed cut flatters without ever feeling oversized. Equally at home beneath a blazer or worn solo, this shirt is an indispensable addition to the modern gentleman's wardrobe. Available in sizes S through to 3XL, it's designed to fit and flatter men of all builds.
Free UK delivery on every order — no minimum spend required.
Your order is carefully packaged and sent with full tracking, so you always know exactly when to expect your delivery.
Order today and we'll dispatch it the next working day.
Not quite right? You have 30 days to return your purchase — no questions asked.
We also offer a 2-year guarantee against manufacturing faults, because we stand behind everything we sell.
Choose options
Worn by you
You May Also Like
Frequently asked questions
How do I know this will fit me?
What is your returns policy?
How do you ensure the quality of your clothing?
Are the colours accurate in the product photos?
When will my order arrive?
Why shop with Koossa?
The Koossa team
We stand behind every piece we sell
We started Koossa because we believed fashion could be both timeless and trustworthy. Every garment is personally selected for its quality, cut, and craftsmanship. If it wouldn't meet our own standards, it doesn't reach yours. That's not a policy — it's simply how we work.