Kaizen Ai Tank
Kaizen Ai Tank
Kaizen Ai Tank
Kaizen Ai Tank
Kaizen Ai Tank
Kaizen Ai Tank
Kaizen Ai Tank
Kaizen Ai Tank

Kaizen Ai Tank

Regular price$85.00

  • Made from recycled materials
  • Low stock - 9 items left
  • Backordered, shipping soon
Size chart


Here's our general size guide. If you are unsure which size to get, don't be afraid to email us at hello@rikahawaii.com.

Please use the "RIKA Size Guide" as an estimate on what size to purchase. Styles, sizes, and cuts vary between each item. 

All RIKA garments are labeled with a USA sizing guide. Our sizes run in six standard sizes: Extra Small, Small, Medium, Large, Extra Large, and Extra Extra Large. We are working on bringing a broader range of sizes and cup ranges. 

All pieces are standard sizing unless advised on the item description.

We suggest reading all garment item descriptions online and checking our try-ons on Instagram to avoid ordering the wrong size.


Perfect balance between sleek and feminine. The Ai Tank is cropped with a scoop neck and back, subtle contour bust outline, and elastic band. From workout to girls night out, the Ai Tank is your pick.

UPDATE: we shortened the straps from the last collection. Thank you for your feedback to help us make these improvements :)

Ethically handmade from REPREVE fabric recycling plastic bottles into buttery soft fabric. 77% recycled nylon 23% elastane.

@tikiwillis is 5’7 and wears a size S
@sivelliia is 5’7 and wears a size M
@vanessamay.44 is 5’7 and wears a size S
@kilenajoy is 5’7 and wears a size S

RIKA prioritizes sustainability as number one. With eco-friendly fabrics improving frequently, we never stop researching and trying all that innovative technology has to offer. Below you can find details on each fabric choice made, so far. Vita Power is where RIKA started (sweat or swim material) and Repreve is the most recent soft launch. 

Vita Power by Carvico aka RIKA'S Sweat or SWIM fabric (featuring ume, chikara, yuki, masa, umi, and wa): Made of ECONYL, regenerated Nylon, with excellent recovery power and always the perfect muscular compression aimed at decreasing the production of lactic acid, thus boosting a faster recovery of energy. Soft and pleasant on the skin, compact and breathable, it is also highly UV protective (UPF 50+). 


  • Recycled yarn
  • Ultra-chlorine resistant
  • Shape retention
  • Perfect fit
  • Muscular control
  • Excellent coverage
  • Soft luxurious feel
  • UV protection (UPF 50+)
  • Pilling resistant
  • Two way stretch
  • Sun cream + oil resistant


TOPGREEN recycled filament (featuring hana and sora): environmentally friendly fiber based material of recycled post-consumer PET bottles, processed through grinding, washing, melting, re-polymerizing, spinning, and texturizing to yarn. Certified by Global Recycled Standard.

  • Repurposes waste, reduces our reliance on petrochemicals and prevents enviornemntal polluition
  • Bottle → chip → fiber → yarn → fabric
  • FENC Recycling is completely traceable from post-consumer to yarn


American Repreve 77% Recycled Nylon + 23% Elastane (featuring momo and ube)REPREVE is made by Unifi, a leading global textile solutions company. Transforms recycled plastic bottles to amazing soft fiber which then is used for fabric. The process embeds properties like wicking, adaptive warming and cooling, water repellency, and more at the fiber level. For reliable, durable quality. They're not just finding new life for recycled materials. Compared to making what's called virgin fiber, making REPREVE offsets using new petroleum, emitting fewer greenhouse gases and conserving water and energy in the process. That makes a big difference for our future.

Customer Reviews

Based on 3 reviews
Allison Milford
So comfy and flattering!

This top is perfection! It’s so comfortable, supportive during workouts and is extremely flattering! A must have piece.

Summer Uwono
Kaizen Ai Tank - Awesome!!!!

Love this new tank/bra. It's super comfy, and very supportive. It's also very flattering! Everything top wise is contained, even with lots of cardio bouncing. ;)

Amanda Kutaka

fits amazingly! the best. i want all colors