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Fashion glossary

What are slacks: definition, features, and what to wear them with

Isabella García 2 min read

What are slacks?

Slacks — these are trousers with a loose, straight or slightly tapered cut, designed for everyday wear and smart casual style.

Read also our full guide: Types of Women's Trousers: How to Distinguish Premium from Mass-Market

The name comes from the English word Slack (relaxed, loose), reflecting the original concept of this garment. They appeared in the 1930s as an informal alternative to formal suit trousers and were initially an exclusively male wardrobe item.

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Classic slacks' cut details include belt loops, tucks, and welt pockets.

In modern fashion, slacks represent the golden mean between formal and relaxed style. They look more elegant than jeans, but less formal than classic office trousers with a crisp crease.

Distinctive features

The key feature of slacks is their construction. They feature a mid- to high-rise, a loose fit through the hips, and straight or slightly tapered legs.

Characteristic cut details include pleats at the waist, welt pockets on the sides and back, and belt loops. Slacks may have creases, but they are usually soft and not pressed like those on dress trousers.

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Navy high-waisted slacks paired with a white shirt and leather loafers.

Slacks are made from dense, shape-retaining fabrics. Traditional options include gabardine, heavy cotton, twill, and wool or viscose blends. Unlike suit pants, slacks are always a stand-alone wardrobe item and don't require a matching jacket made of the same material.

What to combine with

For a business look, basic slacks in a neutral shade, such as beige or navy blue, are paired with a cotton shirt, a structured jacket, and loafers.

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Olive wide-leg slacks for a casual look with a black turtleneck and ankle boots.

For a casual look, wear these trousers with an oversized knit sweater, turtleneck, or polo shirt. Minimalist white sneakers are a perfect footwear choice for this look.

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Light grey smart casual slacks with an oversized black jacket and white sneakers.

For an elegant look, pair flowing slacks with a silk blouse, a belt with an accent buckle, and low-heeled pumps. A classic trench coat, a straight coat, or a cropped Harrington jacket pair perfectly with these trousers.

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About the author

I
Isabella García

Personal stylist specializing in occasion dressing. Dress code expert — from casual office style to formal events. Believes the right outfit can transform your mood and confidence.

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