Swim Cover Up Dress

Onia

4.5
(31 Reviews)

Product Details

The Onia Burnout Cover Up Slip Dress is the epitome of understated allure. Whether layered or worn solo, this dress is a timeless piece that delivers effortless sophistication.

Materials and Measurements

Color: WHITE | Print: FLORAL | Fabric Type: | Fiber Breakdown: 72% Viscose, 28% Nylon | Category: Casual Dresses | Neckline: V-Neck | Sleeve Length: Sleeveless | Closure Type: Pull on | Shoulder to hemline length: 42" | Length: | Inseam: | Rise: | Leg opening: | Slit length: | Imported.

Size and Fit

Sized: XS-XL

The model is wearing a size small.

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Ratings &
Reviews

  (31)  

Includes written reviews and customer fit feedback.

Fit
Runs Small
True to Size
Runs Large

All Photos

Top Contributor
Size worn:
S
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 6
Height: 5' 1"
Bust size: 36B
Body type: Straight & narrow
Weight: 125lbs
Browse Joanna's reviews
September 22nd, 2025
Need it in my closet permanently!

Great for a cover-up or to go out with a nude lining

Top Contributor
Size worn:
M
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 10
Height: 5' 4"
Body type: Pear
Weight: 154lbs
Browse Maria's reviews
August 25th, 2025
Easy and white

I loved this because is so easy to use perfect for summer

Top Contributor
Size worn:
S
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 6
Height: 5' 4"
Bust size: 34B
Body type: Pear
Weight: 140lbs
Browse Kylie's reviews
June 7th, 2025
perfect vacation coverup

i’m obsessed!!! the only small downfall is that the fabric around the legs is tight and may limit your ability to take large steps. Overall it still worth it for how cute it is!

Top Contributor
Size worn:
S
Overall fit:
True to Size
Usually wears: 4
Height: 5' 8"
Bust size: 32DD
Body type: Athletic
Weight: 133lbs
Browse Emily's reviews
August 6th, 2025
Adorable cover up for bridal pool party

Overall Fit

Just right

Top Contributor
Size worn:
S
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 2
Height: 5' 3"
Bust size: 32D
Body type: Hourglass
Weight: 130lbs
Browse Alexa's reviews
September 19th, 2025
Adorable cover up

I adore this dress and would wear it every day if I could!

Top Contributor
Size worn:
XS
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 2
Height: 5' 1"
Bust size: 34B
Body type: Petite
Weight: 120lbs
Browse Janal's reviews
September 14th, 2025
Gorgeous subtle print, great coverup

Wore this as a coverup as it’s fully sheer. The print is stunning, got compliments. Not stretchy, but still comfortable and short enough for us short gals!

Top Contributor
Size worn:
M
Overall fit:
True to Size
Rented for:
Other
Usually wears: 8
Height: 5' 3"
Bust size: 32C
Body type: Athletic
Weight: 150lbs
Browse Natalie's reviews
August 31st, 2025
Beach cover up rental?! Yes please

Amazing beach cover up!! Felt so chic in Mykonos wearing this

Top Contributor
Size worn:
XL
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 14
Height: 5' 4"
Bust size: 36DDD/E
Body type: Hourglass
Browse Justine 's reviews
August 21st, 2025
cute cover up

it was cute and breathable. a little annoying to take on and off but worth it

Top Contributor
Size worn:
XS
Overall fit:
True to Size
Rented for:
Everyday
Usually wears: 2
Height: 5' 3"
Bust size: 32D
Body type: Pear
Weight: 115lbs
Browse Naomi's reviews
July 22nd, 2025
Not Just a Cover-Up

Renting means thinking outside the box—and this Onia piece was no exception. The moment I saw it, I knew I didn’t want to save it for the pool. Instead, I layered it over jeans and used it as a sheer, textural statement piece. Summer in San Francisco tends to be chilly, so dresses often need a little creative styling to stay wearable. This cover-up was perfect for that, but one note: it doesn’t offer much width at the hem, so walking freely meant hiking it up slightly or styling it into my waistband to adjust the length. Both options worked and gave it even more styling potential. Loved how many directions this could go—definitely a renter’s dream if you’re up for playing with shape and layering. 🪡 Styled for foggy summer by @the.nay.edits

Top Contributor
Size worn:
M
Overall fit:
Small
Usually wears: 4
Height: 5' 10"
Bust size: 36A
Body type: Athletic
Weight: 145lbs
Browse Melody's reviews
June 6th, 2025
Best for inverted triangle body types

Pros: Good if you have a big bust, narrow waist/hips. Floral design is summery. Good bridal option. Ideal for lounging poolside or beach. Packs light, doesn’t wrinkle. Cons: Odd fit. I sized up. Body was very straight and bust gaped. Fabric is unforgiving with no stretch. Doesn’t easily glide over your skin which was a bit of a sensory trigger for me. As others have stated, it’s difficult to walk in. Skip it if you’re picky about fabric, clumsy, and/or plan to imbibe.

Overall Fit

Runs small

Chest

Runs big

Arms & Shoulders

Runs big

Waist

Just right

Hips

Runs small

Length

Just right

Top Contributor
Size worn:
S
Overall fit:
Large
Usually wears: 8
Height: 5' 3"
Bust size: 32B
Body type: Athletic
Weight: 128lbs
Browse Ashton's reviews
April 21st, 2025
Cute

It's big - size down. The bottom of the dress is weirdly not open enough so you have to take smaller steps

Overall Fit

Runs big

Chest

Runs big

Arms & Shoulders

Runs big

Length

Just right

Top Contributor
Size worn:
M
Overall fit:
True to Size
Usually wears: 4
Height: 5' 5"
Bust size: 34DD
Body type: Full Bust
Weight: 135lbs
Browse Samantha's reviews
April 25th, 2025
It’s ok

Wore as a swim cover up. I went with a medium so it wasn’t too fitted but would probably have been ok with a small. The length was perfect and didn’t drag on the floor.

Top Contributor
Size worn:
S
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 4
Height: 5' 6"
Bust size: 34B
Body type: Straight & narrow
Weight: 140lbs
Browse Alison's reviews
October 26th, 2025
Beautiful for the beach

Super beautiful but did not wear because I ended up wanting a beach cover that was shorter

Top Contributor
Size worn:
M
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 6
Height: 5' 2"
Bust size: 34C
Body type: Hourglass
Weight: 135lbs
Browse Marilu 's reviews
August 19th, 2025
Perfect cover up!

Wore it over bathing suit and looked super classy and elegant.

Top Contributor
Size worn:
S
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 4
Height: 5' 4"
Bust size: 32DD
Body type: Hourglass
Weight: 130lbs
Browse Sarah's reviews
July 31st, 2025
Love but didn’t get to wear

Great fit despite reviews I wish I had another occasion to wear

Top Contributor
Size worn:
M
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 6
Height: 5' 6"
Bust size: 34B
Body type: Hourglass
Weight: 140lbs
Browse Lucile's reviews
July 29th, 2025
Great for pool lounging.

Perfect for spending days around the pool.

Top Contributor
Size worn:
M
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 6
Height: 5' 8"
Body type: Athletic
Weight: 150lbs
Browse Kelly's reviews
July 28th, 2025
Really pretty

Pretty dress. Wore it as a beach coverup. I read one review that the bottom of the dress is too tight which makes it hard to walk - and that is certainly true.

Top Contributor
Size worn:
M
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 6
Height: 5' 5"
Bust size: 34DDD/E
Body type: Hourglass
Weight: 150lbs
Browse Jacqueline linson's reviews
July 1st, 2025
Love it.

I love everything about this swim cover-up except that the circumference around the ankles seems too restricting and had to take smaller steps to move without pulling. Perhaps made for someone with a more dainty stride.

Top Contributor
Size worn:
M
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 4
Height: 5' 4"
Bust size: 34C
Body type: Hourglass
Weight: 125lbs
Browse Ashley 's reviews
August 19th, 2025
Very pretty coverup

Top Contributor
Size worn:
S
Overall fit:
True to Size
Usually wears: 6
Height: 5' 4"
Bust size: 34B
Body type: Hourglass
Weight: 135lbs
Browse Shea's reviews
May 18th, 2025
Almost Perfect

This was the perfect length for me (5'4") and was the cutest cover up. However, the bottom fits almost like a mermaid dress and does not allow for long steps, and CERTAINLY no dancing. I found myself holding the bottom of the dress up to walk.

Overall Fit

Just right

Top Contributor
Size worn:
M
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 6
Height: 5' 8"
Bust size: 32DD
Body type: Straight & narrow
Browse Misha's reviews
September 25th, 2025
Great beach coverup!

Top Contributor
Size worn:
XS
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 2
Height: 5' 3"
Bust size: 30C
Body type: Petite
Weight: 125lbs
Browse Darlene's reviews
September 3rd, 2025
Lovely fabric

Hard to remove because there’s no stretch. Loved wearing it at our vacation resort

Top Contributor
Size worn:
L
Overall fit:
True to Size
Rented for:
Other
Usually wears: 10
Height: 5' 7"
Bust size: 36D
Body type: Hourglass
Weight: 156lbs
Browse Karen's reviews
August 29th, 2025
Love it. Beautiful

Considered purchasing but it is dry clean only and I would use as a beach/pool coverup and dry cleaning hold be ridiculous!!

Top Contributor
Size worn:
M
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 6
Height: 5' 5"
Body type: Pear
Weight: 150lbs
Browse Charlotte's reviews
August 17th, 2025
Perfect dress for beach club

Top Contributor
Size worn:
S
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 4
Height: 5' 4"
Body type: Athletic
Weight: 135lbs
Browse Ruth's reviews
August 12th, 2025
Adorable but impractical

Got lots of compliments. Not the most practical for walking anywhere since it didn’t have a slit, but it was fine.

Top Contributor
Size worn:
S
Overall fit:
True to Size
Rented for:
Vacation
Usually wears: 2
Height: 5' 2"
Bust size: 34C
Body type: Hourglass
Weight: 122lbs
Browse Karen's reviews
June 20th, 2025
runs big

perfect for coverup. just ran a little big but it served the purpose. nice fabric seems well made.

Top Contributor
Size worn:
XS
Overall fit:
Large
Rented for:
Party
Usually wears: 2
Height: 5' 6"
Bust size: 34B
Body type: Hourglass
Weight: 135lbs
Browse Amy leigh's reviews
June 3rd, 2025
Pool party pretty

Very pretty. Wore this as a cover to pool party and kinda felt like I was wearing lingerie, but hey, I got a ton of compliments. I think it gives honeymoon or bridal shower vibes but who doesn’t like white for summer?! There’s no slit so I had to gather it to walk with purpose…if you’re a slow meanderer, maybe you’d like it, but I kept chasing small children and I’d gather it up past my knees haha

Top Contributor
Size worn:
S
Overall fit:
True to Size
Usually wears: 4
Height: 5' 8"
Bust size: 34DD
Body type: Straight & narrow
Weight: 127lbs
Browse Zoe's reviews
April 30th, 2025
Cute!

Top Contributor
Size worn:
S
Overall fit:
True to Size
Usually wears: 4
Height: 5' 2"
Weight: 134lbs
Browse Rachel's reviews
September 10th, 2025
looked better online

It looked prettier on the model. it didn't sit right on my body. I am 5'2 and 130 pounds. Im not sure what it was -just didnt looked as good as I expected.

Overall Fit

Just right

Length

Too Long

Top Contributor
Size worn:
M
Overall fit:
Large
Usually wears: 6
Height: 5' 4"
Body type: Pear
Weight: 140lbs
Browse Gabriela's reviews
May 9th, 2025
Never wore because it was too big

Overall Fit

Runs big

Top Contributor
Size worn:
M
Overall fit:
True to Size
Usually wears: 10
Height: 5' 8"
Bust size: 36DD
Body type: Full Bust
Weight: 160lbs
Browse Sarah 's reviews
May 20th, 2025
super stiff and awkward

this material does not give at all. I couldn't take full steps walking down the hall because the materials is to tight. it really doesn't look or feel like a swimsuit cover up.

Overall Fit

Just right

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