Please allow up to 3-5 business days for all orders placed with standard shipping to ship.
Seriously comfy and universally flattering on all sizes. "Must have" is an understatement.
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:
Find My Size
Sienna Tank - White EcoRib BT
Coverage:
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 5'11", 36B and is wearing a size M.
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.
| Size | XS | S | M | L | XL | 14 |
| US Size | 4 | 6 | 8 | 10 | 12 | 14 |
| Underbust | 28 - 29 | 30 - 31 | 32 - 33 | 34 - 35 | 36 - 37 | 37 - 38 |
| Cup | A | B | C | D | DD | DD |
| Size | US | UK | EU | AU |
| 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!
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 5'11", 36B and is wearing a size M.
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.
Handwash in cold water, dry flat. Learn More.
83% Recycled Polyester + 17% Spandex
In our mission to cut plastic, this product comes in biodegradable and recyclable packaging.
Styled by You
Show us how you style your #VitaminAswim
| 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
|
Sienna tank
This tank fits great and the chai color is beautiful.
| 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
|
Vitamin A Swim
💙
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 .
| 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
|
Vitamin A Swim
Hi Rachelle,
We are happy to hear you are enjoying the Sienna Tank! 🧡
Great fit
Great fit
| 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
|
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.
