Siren Tank - Nightfall


Size Guide

Sweat like a dangerous beauty in the Siren Tank. It's high neck halter keeps your chest snug while opening to the back with an artistically crafted triple strap design. The top hugs your silhouette and lays at the perfect place above your hips to give you a flawless fit that doesn't ride up during inversions!

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
  • Ultimate stretch and recovery - no sag, ever.
  • Stamped on size & care label - so no itchy, bulky tags.

Our model is 5'6" and wearing a size 2 top and bottom.

Type: Tanks

Customer Reviews

Based on 23 reviews
Feels great, looks great but be careful of falling out

This tank looks and feels great! The compression is just right not to feel too tight but feels secure. Did really well during my pilates work out but be careful of side boob slippage if you have a larger chest like me.

Love this top!!!!

Ahh I want more colors like purple in this cut.... I am 5'2 110lbs....and size 4 fits well for good length on me, I just want more!!! 💗 💗 💗

Very flattering if you size up!

I'm a very solid size 8, but i ordered this top in a size 10 and i LOVE IT ! :) It fits amazing on my body and supports the chest area very well. The design is soooo beautiful! The shipping was very fast, I ordered from Austria and received the package within a week!

Works on me and I'm large busted!

I was a little leery after reading some of the reviews from larger-busted ladies who felt the side boob coverage might be lacking, but (I'm a 32DD with a shorter torso and about 5'10") I totally love it! It fits me perfectly, part of that may be because my boobs don't naturally splay, so they don't fight with the neckline cut in at all. I don't particularly need the push up feature of the cups but I like the way they give some definition to the otherwise shelf-bra so I kept them in and it looks amazing on me. Wearing it makes me want to immediately work out!!! I feel like this is one of the few tops that really shows off in a super classy, outside-of-the-gym fashion how much effort I've been putting into being fit and becoming stronger.

So happy I sized up because I LOVE IT!

I LOVE this tank! I took the advice from everyone in the comments and sized up from a size 6 to a size 8 and I'm so happy I did! It fits perfectly and is so flattering! This will definitely be a workout AND night out tank ;)

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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