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Super soft, super sustainable, this side-slit tank dress perfectly hugs your curves. A dress you'll want to live and lounge in.
Made with a super soft, super sustainable blend of Tencel® + organic cotton.
Fabric Guide
BioSculpt

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Plant-based raw material sourced from castor bean.
• Organic alternative to fossil fuel based nylon
• Extra lycra content for strategic support
EcoLux

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Made from a blend of recycled nylon and Lycra.
• Superfine matte jersey
• Superior stretch
EcoTex

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Made from a nylon and Lycra blend.
• Superfine, scrunchie, touch-me texture
• Sustainably made in California
EcoCotton

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Made from a blend of recycled cotton and Tencel.
• A super soft and lightweight knit
• Sustainably made in California
EcoRib

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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

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Made from 100% Linen.
• Breathable
• Earth friendly + biodegradable
Organic Rib

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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

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Made from a Nylon, Spandex, and Metalized Polyester blend.
• Silky soft
• Jersey Stretch
EcoSoft

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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:
Find My Size

West Organic Rib Tank Dress - Agave Organic Rib
Coverage:
Fits true to size.
• Organic ribbed fabric
• Side slit
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.

Size |
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Size | US | UK | EU | AU |
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XS | 2 - 4 | 6 - 8 | 32 - 34 | 4 - 6 |
S | 6 | 10 | 34 - 35 | 6 - 8 |
M | 8 | 12 | 35 - 36 | 10 - 12 |
L | 10 | 14 | 36 - 37 | 12 - 14 |
XL | 12 | 16 | 37 - 38 | 14 - 16 |
Still not sure about the fit or style? We’re here to help!
Fits true to size.
• Organic ribbed fabric
• Side slit
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: Machine wash in cold inside out with like colors, tumble dry low .
26% Organic Cotton + 66% Tencel + 8% Lycra
Made from blend of sustainable Tencel, organic cotton, and Spandex for texturized, ribbed beachwear. Sustainably made in California.
Styled by You
Show us how you style your #VitaminAswim
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5 Stars97 Reviews
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4 Stars4 Reviews
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3 Stars3 Reviews
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2 Stars3 Reviews
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1 Star3 Reviews
Rib tank dress
Love the fit and true to size. Fabric is great!
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Summer style
Love this dress…fits well and is soft and comfortable.
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Sexy yet comfy casual
I love everything my about this dress from the color to the style and most of all the fabric. It fits my body comfortably yet sexy casual! I want this dress in every color!! Wish all colors were on sale and in my size
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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
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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.