Heart Strings Bra - Night


Size Guide

This style runs slightly smaller, so order a size up!

Inspired by the strings of a harp, Cassey designed a bra for smaller busted ladies that will make you feel as angelic as you feel unstoppable. The intricate interlacing straps that grace your back will compliment this perfect sweetheart neckline and ruched centerfront.

But it doesn't stop at just looks - the texture of our new "moss" fabric will feel like butter cream against your skin, while giving your muscles just the right amount of compression.


  • Removable push-up bra cups
  • High quality, ultra soft double sided "moss" fabric with a cotton-like feel
  • Shrink and fade resistant material
  • Breathable, sweat wicking fabric

Stylist's Tip:

  • This bra is perfect for light workouts like Pilates or Yoga. 
  • Runs slightly smaller, order a size up.
  • Recommended for smaller busted ladies as it is more low-cut than the Peony Collection bra.
  • If you're looking for more coverage and support, try our Zenith Zip Bra! Or you can layer this bra over another sports bra for a unique look!
    Model Info:
    • Gracie is wearing size 4.
    • Height: 5’ 7”, Bra: 32DD, Bust: 34”, Waist: 27.5”, Hips: 37”

    Type: Sports Bras

    Customer Reviews

    Based on 13 reviews
    Cups are a bit wonky

    This bra is very comfortable and supportive for smaller busts but make sure to size up 1. Also the cups kinda stick out from the sides of the bra and the bra leaves an outline in your normal T-shirts which makes me a bit uncomfortable. The back detail is very pretty with tanks and even though the bra is thin in places (there’s no clasp) it is very strong if you make sure to size up. Overall happy with my purchase!

    Size Up !

    This bra looks great!!, but I should have upsized from a 2 (Peony size) to a 6. The 4 is too small for 32B. The seams ripped when I tried to put it over my head. In Cabernet I am a 4.

    very small

    very cool but very small. i'm a 34B and the size 8 is too small.

    Better than the Peony version

    I have the peony version of this and didn't like it that much because it made me feel flat. However, I bought this one anyway because I needed black sports bras but they were out of the black set-the-bar bras. To my surprise, I instantly fell in love with this black one when I put it on. I didn't realize until now that this bra has a deeper cut than the peony one. Kudos to her team for making that adjustment!

    I always browse for sports bras from popular brans like Nike and VS but I never buy them because I know Cassey's bras are amazing. I'd rather save my money to get something stylish that I know I already love.

    (This is a continuation of my other review on this)

    Better than Victoria's Secret Bras!

    I'm so glad I ordered two of these because they make my boobs look great! They push them toward the center to give nice cleavage, just like the set the bar (STB) bras and unlike what any of the VS bras do for me. It fits me nice and securely. I was afraid that this bra wouldn't give the same cleavage as the STB because it doesn't have full coverage across the front. Even though I love it so much, I'm going to gift the second one to my sister so she can feel how great it is too. She loves cool back designs.

    My only concern with this is that the bra cups tend to get lumpy after washing them and then you can see the odd-looking lumpiness when you wear a top over it. Also, the bra cups in all Cassey's clothing items sit very lateral and thus make me look wide in the bust area. I'm not sure if this is something that should be fixed because this is the only way to achieve the great push-up.

    The fabric of Cassey's items are incredibly durable and is one of the main reasons why I keep buying popflex. I don't see the quality of the items diminish after washing them weekly (with the exception of the bra cups).

    For reference, I'm a 34C (but not full) and ordered a size up based on the sizing chart (size 8). I have size 8 in the STB too.

    Related Items

    POPFLEX Size Chart

    Use measuring tape to measure your body and see what size will fit you best! If you are still unsure, please feel free to email our Customer Love Team at info@popflexactive.com.