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Sienna Tank
$101
Rated 4.4 out of 5
Based on 85 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.

Every design made with our innovated BioSculpt fabric offers UPF 50 sun protection.

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. 


Find My Size:

Measure

• Cup: Match your bra cup size.

• Underbust: Measure around your ribcage directly below your bust. This is not the same as your bra size.

• Waist: Measure around the smallest part of your waistline, keep the tape a bit loose.

• Hip: Measure around the fullest part of your body.


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. 


Find My Size:

Measure

• Cup: Match your bra cup size.

• Underbust: Measure around your ribcage directly below your bust. This is not the same as your bra size.

• Waist: Measure around the smallest part of your waistline, keep the tape a bit loose.

• Hip: Measure around the fullest part of your body.


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 85 reviews
  • 5 Stars
    64 Reviews
  • 4 Stars
    6 Reviews
  • 3 Stars
    7 Reviews
  • 2 Stars
    4 Reviews
  • 1 Star
    4 Reviews
85% 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 4 out of 5
Customer photos and videos
85 Reviews
Reviewed by Heidi P.
Verified Buyer
I recommend this product
Bra Size
32C
Height
5' 6"
Size Purchased
8/M
Size Normally Worn
6/S
Rated 5 out of 5
Review posted

Sienna tank

This tank fits great and the chai color is beautiful.

Loading...
Fit
Rated -1 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

💙

Reviewed by Rachelle P.
Verified Buyer
Sienna Tank - Lagoon EcoRib
Reviewing
Sienna Tank - Lagoon EcoRib
I recommend this product
Rated 5 out of 5
Review posted

Perfect top!

I was hesitant to order this top because I’m a fuller cup so I need the support. I ordered 14/DD and it fit great, I’d probably order a 12/D just for a tighter fit. I love this top and it really is a great! I want to order another colour .

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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 Rachelle,

We are happy to hear you are enjoying the Sienna Tank! 🧡

Reviewed by Dawn H.
Verified Buyer
I recommend this product
Bra Size
36B
Height
5' 5"
Size Purchased
12/D/XL
Size Normally Worn
10/L
Rated 5 out of 5
Review posted

Great fit

Great fit

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 4 out of 5
Support
Rated 4 out of 5
Was this helpful?

Vitamin A Swim

💛

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