Estarer Soft Sided Pet Carrier Airline Approved, 4 Sides Expandable Collapsible Cat Carrier with Pockets & Removable Fleece Pad, Travel Carrier Bag for Cat Dog & Small Animals (Grey)

Great carrier with flexible options- Good for Alaska flights
Tried several carriers before this one, and this one out-did the priciest ones. Great quality materials and construction and the optional side flaps are fantastic for giving you the ability to expand the carrier’s size to the full space available to you under your seat.My dog is a corgi-chihuahua mix, about 24lbs and about 17-18″ from butt to chest in length. While she fit fine enough facing the carrier door front-to-back, I really appreciated being able to let down both the front panel and one of the side panels in order to maximize her space and comfort once we had actually settled onto the plane. This extra room allowed her to curl up and be a lot more comfortable during the trip, which seemed to help with her travel anxiety.The mesh is also nice and breathable, unlike some other carriers I tried that would heat up too much inside the carrier. One of the sides is also non-mesh, allowing me to position it to block off her view from all the strangers when we had a window seat. The extension floor pads can also be used to easily block both sides if needed.We rode on one of Alaska’s medium-sized planes in economy and there was plenty of space for her. I rode on what was probably the smallest Alaska plane on my way there with a different carrier, but the under-seat space seemed fairly similar and I would feel comfortable using this carrier for that one as well.—Tip for use: If you’re not planning on putting down both of the side panels, either: (1) use the provided velcro straps located inside the carrier at the top to hold the unused extension floor pads out of the way or (2) fold the extra padding underneath the main padding. Otherwise, it will just fall on top of your pet like a strange stiff blanket and likely make it pretty claustrophobic in there. But once it’s velcro’d or folded under this isn’t an issue.Second tip for use: If you’re traveling with an animal, get a window seat. It’s just so much less stress, no moving out of the way for seatmates to use the bathroom, and you can seclude your pet from others by blocking the one side and using the side expansions closest to the window.

There is no perfect carrier for air travel.
Unlike other expandable carriers, this one checks two important boxes: it has ventilation on three sides when completely zipped up (a requirement for domestic flights on Delta), and it expands on the ends. The wire frame does not have much give, so it might be a bit of a workout to squash it under the seat on certain aircraft (e.g., those awful Boeing 757s that Delta uses). As others have mentioned, the sideboards do not stay up when the carrier is not expanded. I have not used this yet because I am looking for a wheel base for it. This carrier cannot be used for international flights on Delta because it does have ventilation on four sides. I would love it if this carrier came with a detachable wheel base and ventilation on one more side.

Bottom not sturdy and smells like plastic
I purchased this bag because I loved it had 4 options for expansion. I returned the bag though because the bottom didn’t feel sturdy enough to not buckle under weight (it was just a piece of thicker cardboard material) and the plastic smell of the netting was so strong it made me nauseous. I really wanted to like this but not for me.

Wrong item
Bought this carrier cause I liked that it expands and has multiple sides for my pet to breathe from, but when it arrived I recieved a tiny carrier that only opens on one side. I spent $40 and got something that I could normally buy for $15. What I recieved is not even from the same company.

Ce sac est parfait pour un chat assez petit (genre 4kg, 5kg). Il est facile à plier, ranger, ne prend pas de place. Le tapis à l’intérieur peut etre détaché pour etre lavé et il est possible de l’agrandir en ouvrant les compartiments, ce qui est pratique pour l’animal. Je l’ai depuis un an et les coutures tiennent bon, le grillage ne s’est pas abimé du tout. Les sangles permettent de porter le sac soit à la main soit à l’épaule. Je prefere à la main car sinon le sac à tendance à trop bouger d’avant en arriere et l’animal est balancé.Bon produit.

The kittens immediately approved it as a new sleeping spot! Took them out to the vet and opening the bag from the top is very handy when you only want to pick out one cat from the bag, assures that nobody escapes. Having it expandable to make more room will surely be practical for longer travels with train and flight. It’s also a very good looking bag!