Pay in installments of $5.95 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 21 - Jul 26
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
uppababy car seat sizes UPPAbaby Infant Car Seat BaseAn extra Aria Infant Car Seat base allows you flexibility and ease of travel. Ideal for multiple family vehicles no more swapping car seat bases between relatives, babysitters or spouses! EXTRA BASE: An extra infant car seat base allows you flexibility and ease of travel. Ideal for multiple family vehicles no more swapping car seat bases between relatives, babysitters, or spouses! INSTALL IN SECONDS: We make installation quick and simple for you by
An extra Aria Infant Car Seat base allows you flexibility and ease of travel. Ideal for multiple family vehicles – no more swapping car seat bases between relatives, babysitters or spouses!
- EXTRA BASE: An extra infant car seat base allows you flexibility and ease of travel. Ideal for multiple family vehicles – no more swapping car seat bases between relatives, babysitters, or spouses!
- INSTALL IN SECONDS: We make installation quick and simple for you by combining our SmartSecure system, auto-retracting LATCH design, bubble level indicators, red to green visual indicators, plus four-position adjustable foot.
- INCLUDED LOAD LEG: The adjustable load leg adds stability and increases overall safety through limiting forward rotation during a front collision to reduce the chance of a head or neck injury.
- ANTI-REBOUND+ PANEL: The anti-rebound+ panel provides increased safety and protection by limiting the rotation and movement of the car seat in the event of a rear-impact collision.
- SEAT BELT INSTALLATION: Built-in lock-off for secure seat belt installation.
- FINISHED BOTTOM: The smooth, finished base bottom won’t damage car interiors.
- COMPLIMENTARY CONSULATIONS: Schedule a one-on-one virtual consultation with a Certified Technician from the UPPAbaby website for product support, car seat checks, or service appointments.
- COMPATIBILITY: Fits UPPAbaby Aria or Mesa Max Infant Car Seats. Not compatible with Mesa and Mesa V2 models. Infant carrier not included.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 6 reviews
Sort
Product Reviews
★★★★★ 4
A little snug on the thighs
Size: Medium, Color: Multicoloured G (5-pack)
Super comfy, soft and thin. For reference, I'm 5'6", 135, athletic build. I bought medium. I almost returned them because I thought they were a bit too snug on my thighs, and my thighs are not large at all. I was concerned about panty lines under snug clothing. But, because they're thin, I figured they would probably stretch, so I kept them. So far, I've only worn them under a night shirt, but they're super comfortable and they dont ride up at all. Very nice, but if your thighs are a little thick, you probably won't like them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 29, 2025
★★★★★ 5
Functional + Sexy
Size: Small, Color: Multicoloured E-(5-pack), Size: Small, Color: Multicoloured E-(5-pack)
Not only do these feel good, my husband can’t keep his hands off me. They fit so good and are soft. I change into these to sleep but also just use them as shorts to wear around the house. They’re comfortable and don’t slide around. I got a size small and I’m 100lbs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 13, 2026
★★★★★ 5
Finally!
Size: X-Large, Color: All Black D (5-pack)
Finally, comfortable underwear that don’t end up giving me a wedgie. I have a round booty and most cuts of underwear end up shifting as I walk and sit. The hem of the underwear comes right under my cheeks and the lightweight material ensures there’s no panty line and no shifting to where I don’t want them! I’m definitely purchasing more.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
★★★★★ 3
Ehh
Size: Medium, Color: Multicoloured E-(5-pack)
Very thin, still comfy but very thin material. Super soft though. I've worn and washed and they have held up but I won't be repurchasing bc these are so thin
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
★★★★★ 5
They’re fantastic!!!!
Size: X-Large, Color: Multicoloured E-(5-pack)
My clothing size is 16/18 and XL. Even though Amazon suggested a size XXL, I ordered my normal XL and they fit perfectly.
The fabric for this style is 92% bamboo viscose and is amazingly soft and almost silky feeling. I had ordered a different boy short in this brand but they were 80% bamboo viscose and the fabric was significantly heavier. I returned those and ordered these.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026