Please Select Your Size

Deep Navy / XS

Runsie Romper

$52.90 $85.00

Color: Deep Navy

This all-in-onesie features comfy wide crisscross straps, a peek-a-boo keyhole boob sweat vent, and a waist-snatching waistband with flowy run shorts, complete with built-in matching underwear so you can move with confidence. 

Perfect for jogging, walking, hiking, and weightlifting.

 FINAL SALE: No returns or exchanges 

Performance Level:

Features + Fit

• Wide crisscross straps
• Keyhole boob sweat vent
• Removable pads
• Built-in underwear
• Outer leg slits to allow full range of motion
• Inseam: 1.75“ (4.5 cm)

Model Info

Collapsible tab contentSamara is wearing size S
Height: 5’9” • Bust: 32 • Bra 32C • Waist: 25” • Hips: 36”• Torso: 58”

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

Top: Brushed ButterSoft Flex
75% Nylon + 25% Spandex
Shorts: 100% recycled polyester; stretch woven fabric

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 81 reviews
Kara G.
Size Bought: XS
Overall Fit: Small
Height: 5’4
Bra Size: 36B
Body Type: Hourglass
Weight: 110 lbs
Great For Summer Walks

This romper is really nice for hot summer days. If you’re going walking, jogging, roller skating, or even just running errands. I really like the cut of the design but would prefer a different style of short. It also may run small on you if your hips are wider than your waist. The waist of the romper doesn’t have as much elasticity as I’d like. But I still really like it as athletic wear or as a casual easy outfit for coffee and grocery runs. 7/10, would recommend

Great to hear that Runsie Romper is your go-to choice for your summer activities, whether it's walking, jogging, or running errands! Thanks for your review.

Size Bought: S
Overall Fit: True to Size
Height: 67 inches
Bra Size: 34B
Body Type: Straight & Narrow
Weight: 129
Wearing it indoors

Knew this wouldn’t be flattering when I bought it, but wanted to use it for at home workouts. As someone who is not very curvy, I know that rompers will always make me look boxy. This was the case here. The top portion looks great, but the shorts just don’t go and flair out in an unflattering way. I got the blue, so maybe the white version would have looked better, but even when I asked my partner what he thought of it, his response was: I don’t think you want me to answer that. Will not be buying again, but hopeful a newer version will come out. Bottom line: functional, but not flattering on all body types.

Thank you for your review! I'm sorry to hear that the item wasn't the perfect fit.

Size Bought: XS
Overall Fit: Large
Height: 5’4
Bra Size: 34DD
Body Type: Straight & Narrow
Weight: 118lbs
Not great

I love the design! However my booty gobbles up the panty and it hurts when I run. Maybe this item isn’t the best for me.

Thank you for your review! We are sorry to hear that you did not love it.

Size Bought: M
Overall Fit: True to Size
Height: 163 cm
Bra Size: 34D
Body Type: Pear
Not really suitable for jogging

I really like the style but unfortunately the top part is not supportive enough for jogging, running or cardio, which was I bought it for. I hope there will be an updated version of this with more supportive bra and pockets. It will be perfect for runners.

Thank you for your review and feedback!

Kaitlyn Hess
Size Bought: S
Overall Fit: True to Size
Height: 5’4”
Bra Size: 30D
Body Type: Pear
Weight: 120
Love this runsie but one suggestion

I was so excited once I tried this on. It fit like a glove and was so light and seamless. I love how breathable in the torso and flowy over the legs it is. The built in underwear are fantastic.
My one suggestion to make this truly compatible for runners is to incorporate a small zip pocket in the back for keys and credit cards.

Thank you so much for this review! We will pass your suggestion on to Cassey and the team!

Size Bought: XS
Overall Fit: True to Size
Height: 5'2"
Bra Size: 32B
Body Type: Straight & Narrow
Weight: 93
One of my favorite Popflex purchases!

I love rompers because they're easy to throw on and you don't have to dig around for a top and bottom. I particularly liked this one because it had a 1) short like bottom rather than a fitted biker short style bottom (no cameltoe or underwear line worries!) 2)swimsuit style liner on the inside inside of full shorts (less constrictive). And l love it! It's probably one of my favorite Popflex pieces!

I ordered an XS (I am 5'2" and 93 lbs with 32B bust). It fits perfectly, is super soft and stretchy. It doesn't feel constrictive and is airy in all the right places! The swimsuit liner is super comfy and the shorts are flowy, the gap in the middle allows for airflow so it doesn't feel constrictive/sweaty and the straps fit well, don't dig it slide down. The only negative I have is the padding slides down sometimes so I have to reach in and pull the passing back up but not a big deal since I got the navy color, but I can imagine on the lighter one it might be noticeable.

For sizing, make sure you go by your hip size. The hip area where the shorts are attached doesn't have a lot of give so it's tighter when pulling over the hips. I have 32in hips and I am just able to slide it on and off without worrying about it ripping, but it's definitely close. Also consider your height/torso as well for sizing. Lengthwise on me the XS fit just right for my height, but if I was a little taller I think it would be a bit tight and too short (the shorts just cover the curve of my butt). So size up if you're tall or prefer more booty coverage or if you have wider hips. Also, I think the design works better for smaller busts since the bust area is pretty small.

Overall I love this romper! I hope Casey will design similar rompers or at least add some more colors and patterns!!

We are so glad you love it! Thank you for this very detailed review!