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Sienna Tank
$135
Rated 4.4 out of 5
Based on 69 reviews

Our Plant Based Swim is ultra-supportive, super stretchy, and made from the castor bean (replacing fossil fuels). Breathable and quick-dry, perfect for water + workouts.

Fabric Guide

Fabric Guide

BioSculpt

Plant-based raw material sourced from castor bean.

    Organic alternative to fossil fuel based nylon

    Extra lycra content for strategic support


EcoLux

Made from a blend of recycled nylon and Lycra.

    Superfine matte jersey

    Superior stretch

EcoTex

Made from a nylon and Lycra blend.

    Superfine, scrunchie, touch-me texture

    Sustainably made in California

EcoCotton

Made from a blend of recycled cotton and Tencel.

    A super soft and lightweight knit

    Sustainably made in California


EcoRib

A sexy, stretch-ribbed fabric made from recycled Nylon fabric scraps.

    Lightweight, breathable + form flattering

    Production saves 33 liters of water/meter of fabric

    Sustainably made in California

EcoLinen

Made from 100% Linen.

    Breathable

    Earth friendly + biodegradable

Organic Rib

Made from a blend of sustainable Tencel, organic cotton, and Spandex.

    Super soft

    For texturized, ribbed beachwear

    Sustainably made in California

    GOTS Certified Organic Cotton

    OEKO-TEX certified, Non-Toxic + low impact dyes

Metallic

Made from a Nylon, Spandex, and Metalized Polyester blend. 

    Silky soft

    Jersey Stretch

EcoSoft

A super soft plant-based fleece blend made from 60% hemp and 40% organic cotton.

    99% Compostable and biodegradable

    GOTS Certified Organic Cotton

    Organically grown without pesticides

    OEKO-TEX certified, non-toxic + low impact dyes

Fabric:

Essential Colors:

Limited Edition:

Size: Find My Size

Find My Size

Product image

Sienna Tank - Marisol BioSculpt

Coverage:

Less Support More Support

Size 10-12 tops are constructed with more depth to accommodate D-DD cup sizes. For A and small B cups, try wearing back to front, for instant cleavage.

• Pullover

• Wide underbust band

• Fully lined


Model is 5'10", 32B and is wearing a size S. 


Still not sure about fit or style? Start a Live Chat with our fit experts.

Fit Finder

Measuring Guide

Size Chart

Enter your measurements below to find your recommended size.

We recommend size:

The size selected is not available.

Still not sure about the fit or style? We’re here to help!

Start a live chat with our fit experts now.

4/XS
6/S
8/M
10/L
12/D/XL
14/DD
Less Support More Support
Fit Details

Size 10-12 tops are constructed with more depth to accommodate D-DD cup sizes. For A and small B cups, try wearing back to front, for instant cleavage.

• Pullover

• Wide underbust band

• Fully lined


Model is 5'10", 32B and is wearing a size S. 


Still not sure about fit or style? Start a with our fit experts.

Fabric + Care Instructions

Handwash in cold water, dry flat.


77% Plant-Based Polyamide + 23% Lycra spandex fiber

Sustainability

Our plant-based raw material sourced from the castor bean. BioSculpt is an organic alternative to fossil fuel based nylon fabrics with extra Lycra content for strategic support.

Styled by You

Show us how you style your #VitaminAswim

average rating 4.4 out of 5
Based on 69 reviews
  • 5 Stars
    51 Reviews
  • 4 Stars
    4 Reviews
  • 3 Stars
    6 Reviews
  • 2 Stars
    4 Reviews
  • 1 Star
    4 Reviews
83% of reviewers would recommend this product to a friend
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Quality
Rated 4 out of 5
Support
Rated 3 out of 5
Customer photos and videos
69 Reviews
Reviewed by Hilliary
Verified Buyer
I don't recommend this product
Bra Size
32B
Height
5' 4"
Size Purchased
6/S
Size Normally Worn
6/S
Rated 1 out of 5
Review posted

Way too small

I ordered the small, the fit guide said the model was a 32B and a size small. I'm a very small 32B so I got the small and I can barely get it on and it cuts my boobs off in half. Unfortunately, I even paid for rush delivery to get it before a trip and now it's too small to bring with me and likely can't get a bigger size in time. Wish there was better size information to make an informed decision. Vitamin A talks about "sustainability" but not providing proper sizing leads to more returns = not sustainable.

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Fit
Rated -2 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Quality
Rated 4 out of 5
Support
Rated 1 out of 5
Was this helpful?

Vitamin A Swim

Hi Hilliary,

We appreciate your feedback! We're sorry to hear there were difficulties finding your perfect size. Our team will reach out shortly to assist with sizing and any other question you may have.

Reviewed by Adrienne M.
Verified Buyer
I recommend this product
Bra Size
34C
Height
5' 4"
Size Purchased
8/M
Size Normally Worn
6/S
Rated 5 out of 5
Review posted

I may have to buy more colors

This is the perfect mix of sporty and sexy!

Love the color too.

Loading...
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Quality
Rated 5 out of 5
Support
Rated 4 out of 5
Was this helpful?

Vitamin A Swim

Hi Adrienne!

We really appreciate your feedback and are so glad to hear you are loving the Sienna tank. xx

Reviewed by Elena R.
Verified Buyer
I recommend this product
Bra Size
34B
Height
5' 9"
Size Purchased
8/M
Size Normally Worn
6/S
Rated 2 out of 5
Review posted

Cute cut, way too small

Loved the color and cut, but the swim suit is way too small. I normally wear a small, but the medium was too small

Loading...
Fit
Rated -2 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Quality
Rated 4 out of 5
Support
Rated 3 out of 5
Was this helpful?

Vitamin A Swim

Hi Elena,

Thank you for sharing. We would love to help you more with sizing. Our customer service team will reach out to you shortly to help with fit and answer any other questions you might have.

Sustainability is Sexy

Sustainability is Sexy

Our Promise

We believe style + sustainability are inseparable. All of our bikinis and bodysuits are sustainably made in California, from plant-based and recycled materials.
Super Natural.

As a proud member of 1% For the Planet, we give back to organizations who work to protect our oceans and the environment.

Explore BioSculpt

Explore BioSculpt