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Women's Swim Bottoms UPF 50+

Women's Swim Bottoms UPF 50+ is rated 4.4 out of 5 by 14.
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  • UPF 50+
  • Perfect swim base layer for under your favorite Coolibar swim tights or skirts
  • Reversible from solid to solid, or solid to print
  • Flatlock seams make for a smooth, comfortable fit
  • Aqua SUNTECT®: Chlorine and saltwater resistant with 4-way stretch
  • Easy care: machine wash, line dry
  • Imported

  • The fit:
  • Modern cut leg; modest but not a full brief
  • Smooth interior elastic won’t slip or sag in back

  • Great for:
  • Swim and poolside
  • Active wear
  • Anytime daily wear
  • Pair it with Coolibar swim tights or swim skirts!

The perfect swim base layer under Coolibar swim tights or skirts! The Swim Bottoms features a classic cut with a mid-rise waist for an athletic fit that’s smooth, not skimpy, a fashionable fit that’s not a full brief, but still provides plenty of no-slip coverage. Each piece is reversible from color to color or from print to solid. Lightweight fabric dries quickly for quick transition from the water to the shore. Flatlock seams won’t protrude or dig in.

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Fabric Details

aqua SUNTECT® Chlorine and saltwater resistant with 4-way stretch

Recommended for: swimming, stand-up paddleboarding, waterskiing, fishing and boating, leisure watersports in swimming pools, fresh and saltwater

Avoid: active fitness, not moisture-wicking and may cause overheating

Coolibar’s sun protective clothing is designed to be worn in the sun and to provide excellent UV protection. If you have any questions about size, fit or style, talk to one of our Customer Service Representatives at 1-800-926-6509. They'll be happy to help, as well as offer expert advice on coordinating sunscreen hats with your wardrobe. 

Match your measurements (in inches) to the chart below. If your measurements fall in between two sizes, you may prefer the larger size. 


SIZE 2 4 6 8 10 12 14 16 18 20 22 24 26
BUST (inches) 32 33 1/4 33 1/2 35 36 1/2 38 39 1/2 41 43 45 47 49 51
WAIST (inches) 25 26 26 1/2 27 1/2 28 1/2 30 31 1/2 33 35 37 39 41 43
HIPS (inches) 35 36 36 1/2 37 1/2 38 1/2 40 41 1/2 43 45 47 49 51 53


HEAD (inches) 21 1/8 - 23 1/4 23 1/4 - 24 24 3/8 - 25 1/8 22 - 24 3/4
HEAD (cm) 54 - 59 56 - 61 62 - 64 56 - 63
HAT SIZE 6 3/4 - 7 3/8 7 3/8 - 7 5/8 7 3/4 - 8 7 - 7 7/8
Due to the range of fabrics and styles, each hat fits slightly different. See individual hat sizing ranges on their product pages. Our One Size hats are designed to fit most.


Circumference (inches) 6 - 7 7 - 8 1/2 8 1/2 - 10
Measure circumference of hand around fullest part just below the knuckles, excluding thumb. Use right hand if right handed, and left hand if left-handed. Measure hand in inches and refer to the sizing chart for your glove size. Use the larger number to determine your size. People with extra long fingers, or who would like a looser fit should consider ordering a size up.


BICEP (circumference) 7 1/4 9 1/4 11 1/4 13 1/4
WRIST (circumference) 5 1/4 5 1/2 6 6 1/4
SLEEVE LENGTH 18 20 22 1/2 22 1/2


30C, 30D *
32A, 32B, 32C, 32D *
32DD, 34A, 34B, 34C *
34D, 34DD, 36A, 36B, 36C *
36D, 36DD *
38A, 38B, 38C, 38D *
40A, 40B, 40C, 40D *
42A, 42B *
42C, 42D *

The measurements on our size chart are very similar to most major clothing companies. However, we generally allow for a relaxed fit - geared for outdoor activity, travel or a casual outing. Pants, skirts, blouses and polo shirts have extra room for comfort and are not body hugging. 

When fitting jackets, cover-ups or any outerwear, our fit model is wearing the appropriate under layers that we would expect you to be wearing. You do not have to "size up" - we have done that for you. 

Never try to measure yourself. Seek the help of a companion and use a soft tape measure. 

Height: Stand in stocking feet, with feet together, back to the wall. Measure from top of head to the floor. 

Arm: Bend arm to 90 degrees. Place hand on hip. Start at center of back of neck. Measure across the shoulder to the elbow and down to the wrist. Number of inches equals your sleeve length. 

Bust/Chest: With the arms relaxed down at sides, measure fullest part of bust/chest, keeping tape parallel to floor. 

Hip: Stand with heels together, keeping tape straight and parallel to the floor. Measure around fullest part. 

Neck: Measure around base of the neck (the lowest point of the neck). Number of inches equals the neck size. 

Inseam: Take a pair of pants that fits you well. Measure from the crotch seam to the bottom hem. Number of inches equal inseam length. 

Rise: Start the tape at the center back waist, run the tape between your legs, pulling comfortably at the crotch and up your natural waist. Total measurement is your rise. 

Waist: Measure around your waist, against your skin (not over your shirt or pants) at the height you normally wear your pants. 

Head: Measure around your head, from the center of your forehead, keeping tape straight and parallel to the floor. Measure around fullest part.

Rated 5 out of 5 by from Love the blue stripes I purchased this for workouts and yoga. Misses XS fits perfectly-I am 5’6” and 118lbs. Washed nicely.
Date published: 2018-02-21
Rated 5 out of 5 by from Awesome shirt and Great material! I really love the shirt and word for golf. It is very comfortable. I wanted to buy some more during the sale, but the web wanted my credit card before I could see how much I was being charged. It needs to be fixed so that customers can see the new prices after discounts in order to figure out how much money is owed
Date published: 2018-01-24
Rated 5 out of 5 by from Love this shirt I wear this for golf and teaching is roomy, great sun protection, very comfortable and nice looking. I like th split hem on the side and the collar and buttons make it a very classy shirt!!!
Date published: 2018-01-22
Rated 5 out of 5 by from Comfortable and stylish polo The polo is so comfortable to wear. The fabric is light and breathes well. The blue color is so beautiful! I also love the fit.
Date published: 2018-01-22
Rated 5 out of 5 by from Good fit I bought these to wear under my swim capris. Great fit and comfortable.
Date published: 2017-02-03
Rated 5 out of 5 by from Fits well. Looks great. Fits well. Looks great. Salt water and chlorine water resistant. Great value for the money. Like that it is reversible.
Date published: 2016-08-07
Rated 1 out of 5 by from Do not like I'm 5'2" 115 lbs and got the x-small. Pros: Like the print Reversible Cons: Muffin top in front and baggy in the back
Date published: 2016-07-25
Rated 2 out of 5 by from Wrong sizing I bought this 2 months ago on sale. It is way too big. I have purchased several coolibar products in small and they all fit perfectly. I'm 5'3 120lbs. This swim bottom felt like a large, and the material too thick (is it because it was reversible, so it's double the material? ) I couldn't return it as it was final sale. I tried giving it to my friend who is larger but she also finds it too thick. I tried wearing it under my coolibar swim pants. .. but it felt awkward, felt water swooshing around while swimming.
Date published: 2016-07-05
  • y_2018, m_3, d_20, h_4
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  • cp_1, bvpage1
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  • CLOUD, getReviews, 5.89ms