Best slimming swimsuits that flatten and flatter

Look slim while you sun and swim. Whether you’re post-partum, athletic, or curvy, the right swimsuit tapers your silhouette.

Discover slimming swimwear that conceals, shapes, and colors your figure to confidence. We’ll also explain how slimming swimwear works so you can shop for the right styles and features.

SwimZip makes UPF 50+ swimwear for women who want to look great and enjoy all-day sun and confidence.

Best slimming swimwear styles

What makes a swimsuit slimming?

Structure without squeeze

Slimming swimsuits work through design, not just compression. Look for power mesh or similar lining that smooths while staying flexible. A two-layer approach creates a sleek shape without restricting movement.

Good construction also adds support. Sewn-in or removable cups shape the bust, while adjustable straps fine-tune lift and fit. The most flattering suits spread support across multiple points instead of relying on tight fabric.

Compression swimsuits that flatter

Medium compression with a soft feel gives cleaner lines without discomfort. Swimsuits often use graduated compression (firmer through the core, lighter at the edges) to prevent harsh cutoffs, pinching, or bulging.

Lines that guide the eye

Diagonal lines from wrap and surplice fronts define the waist. Color blocking places dark panels at the sides and lighter shades at the center, creating an hourglass effect. Contrast piping and curved seams enhance existing curves.

The right neckline also helps: V-necks and scoop styles lengthen the torso, while square necks balance wider hips. High necks can shorten the look of the torso.

Shaping details

Ruching disguises the midsection and adds texture without bulk. Strategic seams, including princess lines, empire waists, and side curves, follow body lines to create shape even in solid fabrics.

Supportive bras with underwire lift and separate. For DD+ sizes, shop for a strong internal for comfort and slimming.

Tips for the slimmest fit

Measure right

Measure bust, waist, hip, and torso loop (shoulder to crotch and back). If straps dig or the torso feels short, try long torso cuts or tankinis

A well-fitting medium looks slimmer than a tight small or loose large. Between sizes? Size up, then adjust with straps or ties.

Read about how to get the right swimsuit style for your body type.

Bust support matrix

• DD+ sizes: Look for underwire or molded cups, wide-set straps, and reinforced under-bust bands. Long-sleeve surf suits with built-in bras add full coverage.
• Flexible support: Removable cups and adjustable straps let you tailor fit.
• Torso support: Longline tops and crossback designs spread support, reduce pressure, and smooth lines.

Leg and seat cuts

Medium leg cuts lengthen legs while staying secure. Full seat coverage prevents ride-up and creates clean lines.

High legs can elongate, but they must fit snug without constriction or gapping. Side-tie bottoms allow adjustments for the best leg line.

Best slimming swimsuit brands

SwimZip: Slimming plus sun protection

Every piece is UPF 50+, blocking 98% of UV rays. SwimZip uses construction and design for comfortable slimming.

SwimZip also offers family matching sets, infant swimwear, and modest swimwear, bringing slimming features into styles the whole family can enjoy.

Miraclesuit

Built on compression with its Miratex fabric. Known for bold claims (“10 pounds thinner in 10 seconds”) and draped designs.

Spanx Swimwear

Applies shapewear know-how to swim. Strong smoothing and bust support.

Lands’ End

Known for durability, tummy control panels, and adjustable straps. Comfort-first, with dependable fit.

Athleta

Active-inspired cuts with compression for movement. Best for swimmers who want performance with slimming effects.

Tommy Bahama

Tropical prints with slimming color-block placement. Moderate shaping, more resort style than performance.

Care tips

Keep slimming features intact

You don’t want to degrade your swimsuit’s support, chlorine-resistant fabric, and compression features. Rinse your swimwear after swimming since chlorine breaks down compression fibers quickly. Hand wash in cold water, lay flat to dry. Avoid hot water and hanging, which stretches the elastic.

Preserve UPF

Many swimsuits are made with UV-resistant fabric. UPF fabric lasts longest with proper care. Skip hot tubs, which speed fabric breakdown. Store flat or loosely folded to avoid creases that weaken the swimsuit’s structure and UV protection.

Slimming swimwear by SwimZip

We blend stylish designs, quality materials, and UPF 50+ protection to make swimwear that slims your silhouette and keeps the sun off your skin. Our quality fabrics earned us the Skin Cancer Foundation’s Seal of Recommendation for superior sun protection. Here are our favorite sculpting swimsuit styles:

Women's long-sleeve one-piece surf suit

The women's long-sleeve one-piece surf suit combines compressive construction with full torso coverage for maximum slimming effect. The athletic cut smooths the core while long sleeves create clean lines from shoulder to hip.

• Built-in compression zones target the midsection for core smoothing
• Full zip front allows for adjustable coverage and easy dressing
• Athletic cut with strategic seaming enhances natural body lines

Women's high-waist bikini bottom

The women's high-waist bikini bottom features an inner compression panel that targets the tummy, while a high-rise cut elongates the torso. Mix and match with your favorite bikini top for a customized fit and style.

• Inner power mesh panel smooths and supports the midsection
• High-rise cut sits above natural waistline for maximum coverage
• Medium compression that stays comfortable through all-day wear

Women's sun-protective swim dress

The women's sun-protective swim dress offers an A-line silhouette that skims rather than clings, creating a flattering drape that camouflages the midsection while providing modest coverage.

• A-line cut flows away from the body for figure-flattering drape
• Built-in shorts prevent ride-up and provide secure coverage
• Adjustable straps allow for customized fit and support

Shop SwimZip’s women’s swimwear 🏖️

Slimming swimwear FAQ

Do slimming bathing suits work?

Yes. Women agree that mesh linings, ruching, wrap cuts, and strategic seams smooth and define the waist.

Which neckline slims most?

V-necks and square cuts. They lengthen the torso and balance the bust.

Can I get slimming with full sun protection?

Yes. Long-sleeve surf suits combine shaping with UPF 50+. Or pair a rash guard with high-waist bottoms.

What’s the best choice for long torsos?

Long torso cuts or tankinis with adjustable length.

How should tummy control swimsuits feel?

Supportive but comfortable. Medium compression smooths without restricting breath or movement.

Do I still need sunscreen with UPF swimwear?

UPF swimwear is better than sunscreen, but even full-coverage swimwear doesn’t cover your hands, feet, face, or neck. For exposed skin, apply SPF 30+ sunscreen every hour to fully protect yourself.

What’s the difference between slimming and postpartum swimwear?

Postpartum suits add softer compression, tummy panels, and nursing access. Many slimming features overlap, but postpartum styles adapt to changing needs.

Can I pair slimming suits with modest coverage?

Yes. High waists, long sleeves, and swim dresses are modest swimwear options that also slim.

Further reading

What are the best swimsuits for post-partum?

What are the best tummy control swimsuits?

What are the best swimsuits for curvy women?

The difference between UPF and SPF

What’s the best UV index for tanning?

References

(n.d.). Slip versus Slop: A Head-to-Head Comparison of UV-Protective Clothing to Sunscreen. Retrieved September 18, 2025, from https://pmc.ncbi.nlm.nih.gov/articles/PMC8833350/