Proterra Square Neck Bra - Plant-Based, Ecodegradable™, High-Performance Fit
Proterra Square Neck Bra - Plant-Based, Ecodegradable™, High-Performance Fit
Proterra Square Neck Bra - Plant-Based, Ecodegradable™, High-Performance Fit
Proterra Square Neck Bra - Plant-Based, Ecodegradable™, High-Performance Fit
Proterra Square Neck Bra - Plant-Based, Ecodegradable™, High-Performance Fit
Proterra Square Neck Bra - Plant-Based, Ecodegradable™, High-Performance Fit

Proterra Square Neck Bra - Plant-Based, Ecodegradable™, High-Performance Fit

Regular price$58.00
/
Shipping calculated at checkout.
Premium, high-performance square neck bra crafted from sustainable plant-based bio-yarns.
Color
Size
Size chart

size
30 32 34 36 38 40
AA
2 2 4 6 8 8
A
2 2 4 6 8 10
B
2 2 4 6 8 10
C
2 4 6 6 8 10
D
2
4 6 6 8 10
DD
4 4 6 8 10 10
  • Buttery Soft: Proterra™ yarns feel like a second skin, seamlessly blending luxury with performance.
  • Ecodegradable™: Proterra™ yarns naturally return to the earth without leaving behind harmful chemicals or toxins at the end of its lifecycle.
  • Square Neck Design: A timeless square neckline that enhances airflow and adds a modern, sophisticated touch to your activewear ensemble.
  • Odor Resistant: Proterra™ yarns are naturally bacteriostatic, actively neutralizing odor for the life of the garment.
  • Sweat-Wicking Fabric: Keeps you cool, dry, and comfortable during any activity.
  • Power-Mesh Inserts: Help provide perfect support.
  • Premium Stretch and Recovery: Provides perfect compression with exceptional shape retention.
  • Fit Note: This style fits smaller than it appears on the size chart and runs tighter than our original Proterra Sports Bra. We recommend sizing up for your best fit—especially if you’ve purchased that style before.

90% Proterra™ Fabric:

  • 42% Plant-Based Nylon: 100% bio-based yarn made from castor beans.
  • 40% Biodegradable Bio-Accelerated Nylon: An eco-friendly yarn that decomposes in approximately 5 years.
  • 18% Roica™ V550: A pioneer in eco-circular stretch, and is the world's first sustainable degradable yarn.
  • OEKO-TEX® Certified Yarns: Each yarn knit into our Proterra™ fabric blend is OEKO-TEX® STANDARD 100 certified according to Annex 6, Product Class I.

10% Supporting Materials:

  • Elastic Band (63% Recycled Polyester, 17% Polyester, 20% Elastane): Made with recycled materials, providing durability and a secure, lasting fit.
  • Power Mesh Inserts (83% Nylon, 17% Spandex): Lightweight and breathable to enhance performance and support.

Garment Care: Machine wash cold (inside out). Lay flat to dry. 

Removable Bra Cups: Machine wash cold (inside out). Lay flat or hang to dry

to be eligible for a refund or exchange, item(s) must be returned in new, sellable condition with original hang-tags attached, and within 14 days of delivery. a $7.00 restocking fee applies to all returns.

to begin a return or exchange, visit our self-service return portal

for full details, view our return & exchange policy

plant-based

made with plant-based materials that use less water & energy.

4C_Biodegradable-_png - äktiivwear.co

return to nature

made with certified yarns designed to break down faster than conventional synthetics under specific conditions.

ecodegradable™

apparel packaging and shipping mailers, we are not the same • •

athleisure elevated

äktiiv is designed around an elevated minimalist aesthetic which fits in just as well on a night out as it does in the gym.

  • athleisure elevated
  • fit approved
  • fast drying
  • odor resistant
proterra Leggings - äktiivwear.co
  • 5 stars: 8 (73%)
  • 4 stars: 3 (27%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
S
Suelen Breier (United States)
Marlin / 6

I bought my first set from Aktiiv almost two years ago, and I absolutely love it. It’s still in excellent condition, even though I wear it at least once a week. Sometimes twice. (I always wash it on delicate and let it air dry)

That’s why I decided to get a second set. This time I chose the square neck to try something different. I have a size small in the racerback, and I initially ordered a small in the square neck too, but it felt a bit tight. The medium fits better, so I think I’m in between sizes. I agree with what others have said here. It’s better to size up for a more comfortable fit. It's very cute, I got a lot of compliments!

The quality of the pieces is excellent, and the customer service is great as well. I needed to make an exchange, and the process was super smooth.

Highly recommend!

L
Laura (United States)
Marlin / 8

The fabric is soft and the fit is comfortable, sized up two sizes based on reviews. I changed out the pads because they were almost too large and thin and wrinkled even after washing and hand shaping and laying out to dry.

A
Alyssa Strong (United States)
Black / 10

Great to have a unique but classy sports bra style- ordered one and two sizes larger than the size chart after reading reviews and I ended up keeping the bra that is 2 sizes larger than what the chart says

A
Alyssa Strong (United States)
Thunder / 10

LOVE this company so much! Order 2 sizes larger than what the size chart says (just for this bra). This material is to die for, so buttery and it actually stays put so no more constant adjusting!

A
Anonymous (United States)
Marlin / 8

It's super cute but definitely get 2 sizes bigger than you think you'll need. For comparison, I am a 36 A. Normally size S in bralettes and tanks. I ordered the racerback in L and it was way too big. Decided to try this style instead. Normally I'd go for a 4 or 6 but decided to do an 8 considering all the other reviews. I could have easily gone with a 10. I ended up wetting it and blocking it to stretch it.

C
Colleen Evans (United States)
Marlin / 6

I am glad thatI sized up according to the reviews! It's super comfortable! I have been using it in barre3 classes! The only complaint is that I wish the color was more of a pure blue and less purple! That's just personal preference though! It was a little hard to tell from the photos online.

E
Emily (United States)
Black / 10

This bra is soft and supportive and the style is cute. Note that it runs very small. I have the Proterra sports bra in another style in a size Small and expected a size 6 in the square neck sports bra would fit based on the size chart. I had to exchange to size up multiple times and ended up with a size 10. A size 12 probably would have fit too. For reference I am a standard 34C.

e
ebony henry
Review

I like the fit and feel and absolutely love their concept and approach - however I was a little sad that the yoga pants were see through :/

G
Georgina Varelas-Ruiz
Love it!

So I love the cut of this. I went by the size chart which I found a little off in the end. I'm a 36C sometimes smaller. A size 6 was too tight. A size 8 is perfect; a 10 would probably be too big. Exchanging sizes was easy. The material is amazing! Highly recommend.

A
Alexandra Kahn
Love this bra!

Cute design, quick drying, comfortable, supportive. Got so many compliments!

M
Maisie

Love the silhouette of this bra very flattering! I am a breastfeeding mom and a 38 D and would size up to a 10 for a more comfortable fit but the 8 still worked!