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extra smallflex


Let's Go Seamless Crop Top - Black


Color: Black
Vintage Indigo

This item is FINAL SALE. No returns or exchanges will be accepted.

You deserve to flex, stretch, and unwind comfortably. That’s not basic — it's essential. Pair this crop top with your Seamless bottom-of-choice for a perfect match or your go-to jeans.

This design is part of our Seamless collection: sleek, stretchy, and luxurious.

Compression Level:

Performance Level:

Features + Fit

• Racerback design
• Hidden inside bra with an elastic underband for a secure fit
• Crew neckline
• T-shirt hem (slightly longer in the back)
• Optional pad pockets
• Seamless ribbed fabric
• Low impact

Model Info

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Model Info
Model: Alexus Height: 6’ 0” Bust: 51” Bra: 44C Waist: 46” Hips: 63” Torso: 79” Alexus is wearing size Extra Curveflex (1X/3X)
Model: Aysia Height: 5’9” Bust: 35.25” Bra: 34C Waist: 29.5" Hips: 41.75" Torso: 63.5" Aysia is wearing size Smallflex (S/M)
Fabric + Care

Designed in our most adaptive, ribbed Seamless fabric: 93% Nylon, 7% Spandex

Care: Wash me cold then hang me to dry, please don’t use silicone softener, ok? Thank you for taking care of me. ♥︎

*note: the fabric percentage on our website will differ from the actual product. for the most accurate information, please refer to our website only.

Shipping + Returns

FREE SHIPPING in the U.S. on any order over $100!

Order amount: $0 - $99.99:
$7.95 U.S. shipping (+$2 for yoga mats or bags)
$13.95 International shipping*

Order amount: $100+:
FREE U.S. shipping
$19.95 International shipping*

*International shipping charges do not include customs and taxes which may apply in your country.

DELIVERY TIME: Please allow 5-8 days for delivery of your order if in the U.S. Please allow 2-5 weeks for international orders to arrive depending on each country's customs inspection and postal delivery practices.

RETURNS: We accept returns (excluding Final Sale items) within 30 days of purchase in unworn, unwashed condition with all tags and adhesive liners intact. U.S. returns will have a $5.95 return fee applied that covers the cost of shipping your return back, as we will be providing the shipping label. Your initial shipping charges will not be refunded, only the purchase price of the items you're returning will be refunded. For International returns, you are responsible for any shipping charges spent to mail your return back.

EXCHANGES: We offer free U.S. exchanges within 30 days of purchase to help you get your perfect fit (excluding Final Sale items). Items must be in unworn, unwashed condition with all tags and adhesive liners intact. Just select the exchange option and pick your new item from the available options in the drop-down menu. We offer exchanges for size, color, and style within that item's product category. At this time we are not able to offer exchanges for international orders as those must be returned.

Customer Reviews

Based on 53 reviews
Marianne Brody
So comfortable!!!

I got the extra curveflex in navy. The SECOND I tried this on, it felt like I was wearing nothing, but supported at the same time! The fabric is thick, soft, and stretchy!
I'm 250 lbs and 5'8". For someone that's working on their self confidence, I felt so amazing wearing this! I even wore these with my pj bottoms!
I can't wait to add this to my workout and casual outfits.

Thanks for sharing your experience with our product! Keep rocking those outfits!

Reviewer avatar
Size Bought: XS
Height: 5'2"
Bra Size: 32B/34A
Body Type: Pear
Weight: 115
Cute, but sizing inconsistency

I previously purchased this seamless crop top in black (S flex), and after wearing it a couple times, I quickly realized I should have purchased a size down (XS flex). Fit-wise, the curved-bottom flares out on me. So, I purchased a second seamless crop top in vintage indigo in a smaller size (XS flex), but to my surprise, the Small flex, and the ExtraSmall flex, fit similarly. I compared the two, and they are almost exactly the same cut/size. Not sure if it was mislabeled or inconsistent sizing (varies between the two colors).

In the photo, you can see the black (S flex) is barely peeking under the vintage indigo (XS flex) one.

Thank you for sharing your experience with us! We are sending you an email for more information.

Marna C
Size Bought: XS
Overall Fit: True to Size
Height: 5'0"
Bra Size: 30C
Body Type: Pear
Weight: 108lbs
I love this top!

This top is so comfy, I don't want to take it off. It's the perfect amount of compression, with a nice, thick material. I already have it in the Indigo, but honestly, I hope they make more colors!
Bra size is 30C, chest is 31in, ribcage is 28in, waist is 25in.

It looks adorable! Thank you for sharing!

Marna C
Thick Material, Very Comfy!

I love this top! The thick material is really nice, and the shape is kinda different but I like it. The indigo color is cool. I bought the extra small flex since I have a smaller bust. The compression level is nice, snug but not restrictive. I actually bought it in black, too!
Bra size is 30C, chest is 31in, ribcage is 28in, waist is 25in.

Thank you for the great review!


I took a medium (True to size) and the bust was comfortable but the underbust flap stuck out in an ugly way and nothing I did could fix it (except using pins to pull in the fabric), and honestly i'm disappointed. I initially didn't bother writing this review after I noticed this flaw since international returns cost extra and are a hassle, but it broke my heart that I spent so much on this (including customs as I'm from India) so I figured I should atleast leave a review. This isn't the first time a top I bought from here had some or the other little issue so I hope the Popflex team can figure out a better solution for international customers. Except for this flaw, the top is comfy and material is soft.

We do apologize if we haven't met your expectations this time. Rest assured that the team is working hard on our products and big improvements that will be helpful for our customers.

Size Bought: S
Overall Fit: True to Size
Height: 155 cm
Body Type: Straight & Narrow
Comfortable and Cute!

I love how thick and soft the material is and so many people I know have asked me where I bought this top! It is so cute to wear for both workouts and for cute casual outfits! This top may not be everyone's taste, but I personally think it is one of my best purchases on this website :)

Thank you for your 5-star review!