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Supershort™ Runsie - Iris


Color: Iris
Blue Storm
Focus on your movement, not your ootd. Meet the all-in-one Runsie designed to take the guesswork out of your next workout.

Fit Stylist Tip: Need more support on your next run? Layer the Runsie with your fav high-impact sports bra.

Compression Level:

Performance Level:


Features + Fit

• Anti-cameltoe
• Peekaboo cutout (hello boob sweat vent!)
• Adjustable, crisscross shoulder straps
• Mesh princess seams for an hourglass-enhancing look
• 2 side pockets on built-in inner shorts
• Removable pads
• Scoop neckline

Built-in short inseam length varies on your size:
XXS-S: 3” (7.62 cm)
M-3X: 3 ½” (8.89 cm)

Model Info

Collapsible tab content

Model Info
Model: Sam Height: 5’9" Bust: 32" Bra: 32C Waist: 25" Hips: 36" Torso: 58" Sam is wearing size XS
Fabric + Care

Inner fabric: 77% Polyester, 23% Spandex
Outer short: 85% Nylon, 15% Spandex
Mesh paneling: 85% Nylon, 15% Spandex

Care: Wash me cold then hang me to dry, ok? Thank you for taking care of me. ♥︎

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 40 reviews
Sunshine Runsie💛

This fits me very well! It’s supportive yet comfy. I ordered a size M.
Bust: 36”
Waist: 27”
Hips: 38.5”
Height: 5’8”
The fabric is soft and comfortable and doesn’t dig in at all. I have great mobility while wearing. I love the cool lemon color, very unique, happy, and fresh!

Thank you for taking the time to write this review!

Chris Lara
Rubbing in the armpit

I wanted to love this so bad! I originally bought it in a small and it fit everywhere but I had uncomfortable rubbing in the armpits after only having it on for a few minutes. So I exchanged it for medium (with hesitation, because I’m not normally a medium) I received the medium and after trying it on, I’m having the same issue with the rubbing in the armpit. As well as it being a bit big in the boob area(which I expected, because I have a small chest). I’m not a first-time customer I have bought skorts, a few tanks, the cloud romper, and the game day dress from popflex that I love!! So when this romper didn’t fit as comfortably as the other things I bought I was super sad because I will have to return this and wait/hope that Cassey creates a 2nd generation of this romper where there is no chance of rubbing in the armpits!

So sorry to hear that you're not satisfied with this item. Feel free to contact our Customer Service team with your order number to assist you with a return or you can get the return/exchange policy information from this link:

Accentuates my rolls :(

I really want to love this because it's GORGEOUS. However, I feel like all of the seams around the stomach accentuate my rolls. :(

I am 5'0 ~160lbs and carry the weight in my stomach. If you're similar to me, I'd check out the Superdress! Much more flattering and removes that concern!

Thank you for sharing your experience with us! We are sorry to hear that you did not love it!

I might need to buy more colors….

WOW. Just WOW. I bought the super shorts, loved them, and then was thrilled to see the Runsie!! I’ve always been a 1 piece fan, especially since it means I don’t have to worry about my pants rolling down, or my bra scooting up. This is so perfect and great for layering too! I like to pair with a white t shirt tied at the waist, and I just ordered the Mockneck Shrug I’m excited to pair with this! I also find this to be the most comfortable thing to wear for long car trips or bike rides since there’s no waistband to cut into my stomach

Thank you for your glowing review!

Lauren K.
In love (bonus if you're a popflex super short fan)

I love how this looks! I wanted a little more top support and I wear the super shorts in M, but I was convinced to go with the M for my top since my bust measurement and bra size matched the pink runsie model's size. I had to wiggle a little to get in, but I feel very supported. I also had to put my boobs in place to keep it from being too lopsided or showing in the little keyhole opening. I am a little worried that the lower portion of my boobs might peek out in the mesh panels on the side, but the fit is too good in all other parts I might just have to wear an extra sports bra if it is too noticeable.

The bottoms fit exactly like the super shorts (I've picked up 4 pairs in various sizes as I've been loosing weight and they are my go to's for running) and the adjustable straps are wonderful. Thank you for such a a fun and comfortable product

Thank you for leaving us an amazing review and we really appreciate you taking the time to share your experience and rating with us. Best!

The only one piece outfit you will ever need!

I was a little nervous to try this out since I have a long torso. I ordered a medium and this outfit fits perfectly. Super cute and comfy! The mesh sides and angled shorts are very flattering and the buttercream color is a must have! I will be adding more colors to my wishlist as I need more runsies in my closet💛

Thank you so much for your review and we're glad that you liked it!