Women’s bikini bottoms with UV protection
From full coverage to cheeky cuts, with prints, patterns, and solids, find your new favorite swimsuit in our collection of women’s bikini bottoms.
About our bikini bottoms for women
You'll find bikini bottom styles for every taste, from daring cuts to full coverage. Mix and match them with bikini tops for a look that's uniquely yours.
High-waisted bikini bottoms
Our high-waist bottoms give a retro-inspired look that adds confidence and comfort to your beach day. A flattering ruched front panel adds texture and appeal, and the full-coverage design means no tugging or adjusting. The no-dig leg openings and above-belly-button rise mean you can enjoy beachside activities, play with the kids, or lounge by the pool with complete comfort.
Side-tie bikini bottoms
Our cheeky bikini bottoms put you in control with adjustable ties at each hip—cinch them tighter for active swimming or loosen them for lounging. With a medium rise that sits below your belly button, these bottoms offer moderate coverage that flatters without being too revealing.
The ruching created by the side ties adds beautiful detail to your hips, and the fully lined design means these perfect swimsuit bottoms stay secure and opaque in and out of the water. You'll love how these bottoms let you customize your fit throughout the day; no more choosing between too tight or too loose.
Sizing and fit
In our collection of bikini bottoms (and all other collections), you’ll find swimwear in a wide variety of sizes. Use our size chart to match bust, waist, and hip measurements to their exact size.
Our swimwear fabrics
SwimZip’s fabrics dry quickly and stay light when you're in and out of the water. The material pulls moisture from your skin and resists damage from chlorine, salt water, and sun exposure.
Your suit moves with you thanks to a four-way stretch and stays in place whether you're swimming, surfing, or lounging. The fabric blocks 98% of UV rays with UPF 50+ protection, reducing your risk of sun damage during outdoor activities.
Your swimwear keeps you warm in cold water but won't overheat you in the sun. The strong construction prevents tears and snags, so your suit survives many swim seasons.
Our other women’s swimwear bottoms
In our swimsuit bottom collection for women, you will also find:
- Swim pants: fit close to your legs for full coverage. Choose them for active beach days, full lower-body protection, or a modest swimwear option.
- Swim skirts: feature a pretty overlay that covers your thighs during family beach outings and social pool days.
- Swim shorts: sit above the waist with ample coverage. These support you during water sports and cover your thighs.
What is UPF?
Ultraviolet protection factor (UPF) indicates how effective a fabric is at blocking harmful UV radiation from the sun. UPF is like a sun protection factor (SPF) in sunscreens; it measures how much UV light passes through the fabric to your skin. A fabric is rated by how much UV radiation passes through it.
- UPF measures UVB rays that cause sunburn and UVA rays that penetrate deeper into your skin.
- A higher UPF number means better UV protection (UPF 50+ blocks over 98% of harmful rays).
- UPF ratings start at 15 and go up to 50+, with 50+ offering the most protection.
Here’s what affects UPF:
- Dense, heavy fabrics block more UV rays than loose, thin materials.
- Deep colors and bright shades block more rays than light colors.
- Special UV-protective treatments can increase a fabric's UPF rating.
- Tight weaves and knits provide more UV protection than loose ones.
- Synthetic fibers often block more UV rays than natural ones.
Why choose sun-protective swimwear?
Sun-protective swimwear with UPF 50+ adds more defense than sunscreen alone. Here's what UPF swimsuits do:
- The fabric blocks 98% of UVA and UVB rays to protect your skin during sunny beach days.
- UPF protection stays in the fabric, unlike sunscreen which washes off. You and your family can enjoy family beach outings without constant sunscreen breaks.
- These swimwear pieces cover spots that sunscreen often misses (shoulders, back, and stomach). You stay protected through your outdoor activities, from beach volleyball to walking around the pool.
- UPF fabrics create a barrier for sensitive skin and medical needs. Our high-quality materials guard children's delicate skin better than sunscreen.
- Built-in UPF protection means more time to splash and play at the beach or pool with your family.
What else do you offer in your swimwear collection?
In our sun-protective swimwear collection, you will find pieces for each family member. Make your family look great and stay safe during beach adventures.
- One-piece swimsuits: This classic and flattering swimwear gives you full coverage and support for all water activities.
- Tankinis: Mix-and-match tops and bottoms let you create your perfect fit. The longer tops add coverage and freedom to move.
- Bikini tops: We offer tie-front and halter neck swim top styles that pair with any bathing suit bottoms for a customized beach look.
- Rash guards: Long-sleeved sun protection shirts pair with any swimwear bottoms. The quick-dry fabric keeps you comfortable in and out of water.
- Swim dresses: Full-coverage options blend style with function. The skirted design adds flair to your water adventures.
- Swim trunks: Board short styles reach above the waist for extra thigh coverage and support during active water sports.
- Swim trunks: Full-body coverage for kids comes with front zippers for easy dressing. Built-in sun protection keeps little ones safe at the beach.
Bikini bottoms FAQ
Are classic bikini bottoms less revealing than Brazilian bikinis?
Classic bikinis offer more coverage than Brazilian bikini bottoms. They cover most of your bottom with wider sides at the hips. Women love classic bikini bottoms for swimming and beach activities.
Should bikini bottoms be tight?
Your bikini bottoms should fit snugly but not squeeze. Tight bottoms cut into your skin and leave marks. Loose bottoms sag with water. You'll know the fit is right when the fabric lies flat against your skin without digging in.
Why are my bikini bottoms baggy?
Bikini bottoms stretch from chlorine, salt water, heat, and wear over time. They also lose shape from pulling them up and down while wet. Proper care extends their life: rinse after swimming, avoid hot tubs, and hand wash in cool water.
How can I hide belly fat in a bikini?
High-waist bikini bottoms are great for tummy control as they smooth your stomach. Swimsuit options such as ruched panels and darker colors flatter your shape. A longer tankini top or swim dress provides coverage without sacrificing style.
Can I wear a bikini if I don't have a flat stomach?
Everyone can wear a bikini. In our wide selection of perfect bikini tops and bottoms, you will find something for everyone. Our flattering styles come in plenty of options for all shapes. Pick high-rise bottoms or waisted bikini bottoms that make you feel comfortable and secure.
What colors are the best for bikini bottoms?
Vibrant colors such as black, navy, and deep red prove most flattering and versatile for bikini bottom options. Black slims and elongates, while darker shades conceal wet spots. For comfortable swim bottoms, choose colors that complement your skin tone and existing swimwear collection.
Is retro-high waist style still in fashion?
High-waisted bottoms remain a popular choice for this and all other bikini seasons. This stylish swimwear option flatters many body shapes by defining the waist and smoothing the midsection. You can pair this retro look with classic and contemporary bikini tops for a chic beach outfit.
Further reading
UPF vs. SPF: What is the difference?
How can I swim during my period?