Borrow his closet for an easy summer capsule wardrobe

Susie Faux, the London boutique owner, revived or coined the term in the 1970s, and capsule wardrobes were already appearing in American publications in the 1940s. Borrowing from his closet works best when you take the pieces that solve problems, not the ones that only look dramatic on a hanger. A good summer capsule is built on utility, and the oldest capsule logic still holds: a small set of versatile, high-quality pieces that mix cleanly and carry you farther than a closet full of nearly identical options.

Why the borrowed-closet capsule still feels fresh

The reason this formula keeps coming back is simple: summer dressing asks for clothes that can move between heat, air-conditioning and plans that start at lunch and end after dark. COS’s men’s summer capsule uses polo shirts, denim, blazers and tailored shirts as its warm-weather anchors, while 2026 capsule guides keep returning to the same practical range of 8 to 12 high-utility pieces. Breathable fabrics, neutral palettes and interchangeable layers are the real brief now, which makes borrowed menswear feel less like a stunt and more like the neatest answer in the room.

There is also a visible shift in the blazer itself. Menswear coverage in 2025 has pushed the jacket away from stiff formality and toward casualization, with linen leading the way because it reads polished without trapping heat. The shift turns the blazer into an everyday tool, something you can wear with denim, throw over a T-shirt or pair with tailored trousers without looking overdressed for the season.

Start with the blazer

If you borrow only one thing, borrow the blazer, because it is the fastest way to make the rest of your summer wardrobe look deliberate. The best version for warm weather is soft in structure, light in hand and cut so it skims the body instead of swallowing it. Linen is the obvious summer answer, but the point is not just the fabric, it is the ease: a blazer like this can sit over a white tee, sharpen denim or pull a simple shirt into evening territory.

Fit is what keeps it from looking like costume. The shoulders should sit where your shoulders actually are, not droop halfway down the arm, and the body should close cleanly without pulling. If you are borrowing one that is slightly larger, wear it open and let the looseness look intentional; if it is boxy, keep the rest of the outfit lean so the silhouette reads relaxed rather than accidental.

The smartest styling move is contrast. Pair a linen blazer with a T-shirt and denim for daytime, then shift it over tailored trousers or matching dark denim when the temperature drops at night.

Make the T-shirt look expensive

The men’s T-shirt is the quiet hero of this capsule, and the best ones are the plain, neutral versions that work under a blazer and never fight the rest of the outfit. MenswearStyle argues that premium neutral T-shirts are about fit and comfort first. White, stone, grey and soft black all do the job because they keep the look in the neutral palette that makes capsule dressing feel calm instead of overstyled.

The fit should be clean, not clingy. You want enough room through the chest and torso to move, but not so much fabric that it bunches under a jacket or balloons at the waist. Sleeves should sit in that flattering middle zone on the upper arm, and the neckline should stay close enough to look tidy when the blazer comes off.

This is where borrowed menswear becomes especially useful. A man’s T-shirt often has the right straightness and weight for summer layering, which means it can read more polished than flimsy women’s basics that twist, sheer or shrink into irrelevance after a few washes.

Let the lightweight knit do the in-between work

A lightweight knit, or jumper, is the piece that keeps the capsule from feeling flat. It gives you texture without bulk, which is exactly what summer layering needs when a cardigan would look too heavy and a sweatshirt would kill the line of the outfit. Worn over a T-shirt, it gives the neckline a little depth; slung under a blazer, it adds the kind of softness that makes tailoring feel modern rather than strict.

The best borrowed version is slim enough to layer, but not tight across the chest or arms. Think fine gauge, breathable construction and a neutral shade that plays well with denim, polo shirts and tailored shirts. If the knit is oversized, keep the rest of the outfit sharp so it reads as ease, not volume for volume’s sake.

This piece is especially useful on the days when summer dressing gets tricky, which is most of them. Offices run cold, evenings cool off and travel turns every outfit into a negotiation between comfort and polish. A lightweight knit solves all three without asking you to change the rest of your look.

Build the capsule around the right few pieces

The strongest summer capsule is not a larger wardrobe in disguise. It is a short list of clothes that can rotate across work, weekends and dinner without needing much thought, and 8 to 12 high-utility items is a useful benchmark. Start with the borrowed trio, then anchor them with the pieces COS returns to in its summer capsule: polo shirts, denim and tailored shirts.

From there, keep the rest disciplined. Neutral shades, breathable fabrics and interchangeable silhouettes will do more for your wardrobe than another round of trend-driven buys.