With Nothing Underneath — usually shortened to WNU — is a London-designed label. It’s built almost entirely around one idea: the shirt as a wardrobe essential, not a seasonal trend. Most fashion brands treat the shirt as a supporting piece. WNU, however, treats it as the whole point. Every silhouette, from the roomy Boyfriend to the shorter Weekend cut, is meant to be worn “effortlessly, without thought, or anything underneath” — hence the name.
The range spans fabrics most brands spread across an entire collection: crisp fine poplin, breezy 100% linen, a soft linen-cotton Weave blend, puckered seersucker, sustainable TENCEL™ Lyocell, and durable hemp. London designs every shirt, and Portugal makes it. WNU also holds B Corp certification, which shows up in the details: natural fibres, repairable construction, and a personalisation service that lets you monogram a shirt rather than replace it. This combination of considered design and real wardrobe longevity has made WNU a go-to for London women who want one very good shirt, not five forgettable ones — the same instinct behind our roundup of sustainable fashion brands London women actually wear.
A Quick Guide to WNU’s Fabrics
Because the whole brand centres on one silhouette family, the real decision when shopping WNU isn’t cut. It’s fabric. If you’re still working out which linen shirts actually earn their place in a summer wardrobe, this is a useful place to start. Here’s what each fabric actually feels like to wear.
Linen is the brand’s signature: 100% linen with shell buttons, breathable and slightly textured. It’s the fabric that drapes best over bare skin in summer heat. Fine Poplin, meanwhile, is the crisper, more structured option — closer to a traditional office shirt, and the one to reach for when you want something that holds its shape under a blazer.
Weave is a linen-cotton blend, roughly half and half, that splits the difference: softer than poplin, more substantial than pure linen, and genuinely wearable across three seasons. TENCEL™ Lyocell is the most technical fabric in the range — a silky, sustainably produced material with a slight sheen and excellent drape. In fact, it feels closer to a viscose blouse than a cotton shirt.
Seersucker, used on the Weekend styles, has a naturally puckered texture that barely needs ironing. It’s the ultimate throw-it-in-a-suitcase fabric. Finally, Hemp rounds things out as the most hard-wearing, eco-conscious option: slightly heavier, highly durable, and it improves with every wash.
The Edit: 10 With Nothing Underneath Shirts Worth Buying Right Now
01 — With Nothing Underneath — The Boyfriend: Linen, Lapis Blue
100% Linen · £130
If you only buy one WNU shirt, this is the one people mean when they talk about the brand. It’s cut in the relaxed Boyfriend fit, with a slightly dropped shoulder and a double-pleated yoke. The 100% linen comes in a rich, cool-toned blue that reads as considered rather than “beachy.” Wear it open over a bikini on holiday, tucked into jeans for the school run, or layered under a blazer for something sharper. In short, it’s a shirt that does the thinking for you.
02 — With Nothing Underneath — The Boyfriend: Weave, Khaki Stripe
Linen-Cotton Weave · £130
This is WNU’s best-selling stripe, and it’s easy to see why. The Weave fabric — just over half linen, just under half organic cotton — gives this shirt a softness the pure-linen styles don’t quite have. Meanwhile, the khaki-green stripe, inspired by British beach-hut colours, keeps it wearable year-round rather than strictly for summer. Worn open over cream wide-leg trousers, it creates an “undone” look that takes more effort to fake than it appears.
03 — With Nothing Underneath — The Boyfriend: Linen, White
100% Linen · £130
Every wardrobe guide tells you to own a white shirt — this one is actually built to be lived in. It shares the same relaxed Boyfriend cut as the Lapis Blue, in crisp white linen that forgives a slightly undone top button and a rolled sleeve. Keep it on rotation for absolutely everything: smart-casual dinners, layered under knitwear in winter, or worn alone with tailored shorts the second London’s weather allows it.
“To be worn effortlessly, without thought, or anything underneath.” That’s the brand’s own line — and it’s a genuinely accurate description of how these shirts wear.
04 — With Nothing Underneath — The Weekend: Seersucker, Rain Blue Stripe
Seersucker · £100
The Weekend cut sits shorter and more relaxed than the Boyfriend. This is also where WNU has genuine fun with texture: seersucker is a naturally puckered cotton that barely needs ironing, so it’s the shirt you’ll actually pack for a trip rather than leave folded in a drawer. The Rain Blue stripe feels soft and warm-weather-appropriate without tipping into twee. At £100, it’s one of the more accessible entry points into the range.
05 — With Nothing Underneath — The Boyfriend: Weave, Ocean Blue Stripe
Linen-Cotton Weave · £130
This is the cooler-toned sibling to the Khaki Stripe Weave, in a blue that sits somewhere between denim and duck-egg. It shares the same soft, breathable half-linen construction, plus the slightly dropped shoulder and longer body for a modern silhouette — just a different mood. Reach for this one when you want the ease of the Weave fabric but a palette that leans more “coastal weekend” than “safari.”
06 — With Nothing Underneath — The Boyfriend: Fine Poplin, White
Fine Poplin · £95
This is the most office-appropriate shirt in the edit, and also the entry point into the range price-wise. Fine poplin holds its shape in a way linen simply doesn’t: a sharper collar, a crisper cuff, no risk of looking rumpled by 3pm. If your wardrobe gap is specifically “a proper white shirt for meetings,” choose this one over the linen version above.
07 — With Nothing Underneath — The Boyfriend: Linen, Cardinal Red
100% Linen · £130
For anyone whose wardrobe is otherwise entirely neutral, this is the permission slip. It’s a genuinely rich cardinal red in the same forgiving Boyfriend linen cut. Worn open over white trousers, it reads as a considered statement rather than a costume. It’s also an easy way to make a plain black outfit look deliberate instead of like an afterthought.
08 — With Nothing Underneath — The Boyfriend: TENCEL™ Lyocell, Off-White
TENCEL™ Lyocell · £120
This is the most quietly luxurious fabric in the range. TENCEL™ Lyocell is a sustainably produced, wood-pulp-derived fibre with a subtle sheen and a drape closer to silk than cotton. As a result, this is the shirt to wear when you want something that looks more expensive than it is — tucked into tailored trousers for evening, rather than left open for the beach.
09 — With Nothing Underneath — The Weekend: Hemp, Navy Blue
Hemp · £130
Hemp is the brand’s most durable, most eco-conscious fabric. Rather than wearing out, it wears in beautifully, softening and improving with every wash. This one comes in a deep navy, on the shorter, more relaxed Weekend cut. Built to be the shirt you don’t think twice about packing, it’ll happily see you through a boat trip or an entire unpredictable British summer.
10 — With Nothing Underneath — The Weekend: Seersucker, Pink and Berry Stripe
Seersucker · £100
This is the playful note in an otherwise fairly restrained edit. It uses the same textured, low-maintenance seersucker as the Rain Blue Weekend, but in a warmer pink-and-berry stripe that leans more garden-party than office. In other words, it’s proof that WNU’s “considered basics” approach doesn’t have to mean neutral. Sometimes the most versatile piece in a capsule wardrobe is the one with a bit of personality.
Do WNU Shirts Fit True to Size?
Generally, yes. WNU shirts run true to standard UK sizing (UK 6–18), and the brand’s own guidance across the range stays consistent: “take your normal size.” The fit leans deliberately loose rather than fitted. So, if you’d prefer something closer to the body, size down rather than assuming a smaller size will feel tight. As a reference point, a UK 10 has a back length of roughly 78cm/30.7in. The brand’s own models, around 5’8″ to 5’10.5″, wear a UK 10 across the campaign imagery — a useful benchmark for how the relaxed fit sits on an average frame.
How to Style With Nothing Underneath Shirts
The whole point of the WNU wardrobe is that one shirt works several different ways, depending on what’s around it.
The Beach-to-Bar Formula
THE LOOK — The Lapis Blue or White Boyfriend linen shirt, worn open and loose over a swimsuit by day. By evening, button it three-quarters up and tuck it into linen trousers with gold jewellery. No outfit change required, just a different styling of the same piece.
This is where the Boyfriend fit earns its keep: roomy enough to layer over swimwear, yet structured enough to look deliberate once tucked in. Keep accessories minimal in the day. Then let jewellery do the work once you restyle it for evening.
The Smart-Casual Office Formula
THE LOOK — The Fine Poplin White or TENCEL™ Off-White shirt, tucked into tailored wide-leg trousers, sleeves rolled to the forearm, with a slim belt and loafers. Add a blazer for meetings, then remove it for the rest of the day.
Poplin and TENCEL™ are the two fabrics in the range that hold a crisp line through a full working day. So, reach for these two over the linen or seersucker styles when the shirt needs to look considered rather than relaxed.
The Weekend-Away Formula
THE LOOK — A seersucker or hemp Weekend shirt, worn open over a plain vest with denim shorts, or belted as a dress with sandals. Roll it into a suitcase without a second thought; that’s the entire design brief for this fabric group.
This is the low-maintenance end of the range. Seersucker doesn’t crease the way pure linen can, and hemp only improves with wear — which makes both genuinely good travel fabrics, not just marketing language.
With Nothing Underneath: Your Questions Answered
Where is With Nothing Underneath based?
With Nothing Underneath is a London-designed brand. London designs every shirt, and Portugal manufactures it. The brand also holds B Corp certification, reflecting its focus on natural fibres and responsible production.
Is With Nothing Underneath good quality?
Yes. The brand’s B Corp certification and Portugal-based manufacturing point to genuine investment in construction quality, rather than fast-fashion turnaround. Details like shell or river-shell buttons, reinforced yokes, and fabric choices geared toward longevity — particularly the hemp and linen ranges — are built for years of wear and repair, not a single season.
What is With Nothing Underneath’s sizing like?
WNU runs UK 6 to UK 18 and fits true to size across the range, with a deliberately relaxed, slightly loose cut as standard. If in doubt, order your usual size. The brand consistently advises against sizing up, since the fit already builds in room.
How much do With Nothing Underneath shirts cost?
Prices span roughly £95 for the Fine Poplin styles up to £230 for the Silk Satin shirts. Most of the core range — linen, weave, hemp, and TENCEL™ — sits between £120 and £130. Meanwhile, the seersucker Weekend styles rank among the more accessible options, at around £100.
Can you monogram or personalise WNU shirts?
Yes. WNU offers an in-house embroidery service for £15 per shirt, with a choice of initials, a date, or a heart-and-initial design, in several font styles and thread colours, placed on either the front panel or the cuff. It’s a genuinely nice way to make a gift feel considered. That said, embroidered orders are non-refundable and typically add 7–14 days to dispatch.
Shop With Nothing Underneath
You’ll find the full range — including sizes, colourways, and the monogramming service — directly at With Nothing Underneath.
