These are so disappointing!!!! First bought a small then got the larger size!!!Doors totally broken zippers and what’s the point of a safe place without a door? Larger one also stupid roll up door!!! And top broke as the zipper is extremely faulty!!!! There is no way to fix it !!! Cause they are not made well!!!!! First one small before I received my tiny Maltese broke while rolling it up first time!!!!second one I would just put her in the top!!! Cause the zipper on top is not but one and it does not have a way to zip it up and lock it to other end ? I hate how stupid this product is!!!And it’s a cheap joke made to roll up and stick to the tiny pieces on each side!!! Certainly they should have known better! So to this day I won’t use door on large one but a small teapot Maltese could actually break the flimsy built doors!!!That was to be her play one when busy to keep her safe! The small one for sleeping I had to just tape it to the top!!!Cause rolling well is just how it broke!!! Major issue considering my puppy is not yet 3lbs! And her getting excited and pressing her tiny feet against itI see the likelihood that it could just brake the other zipper door! The tiny stickers don’t work well and it’s going to hang or break the zipper easily!!!As that is what happened to first one! Zippers break just rolling it up to tiny stickers at least the first one did ! So it hangs or risk breaking zippersWithout a working door it’s useless!!! Why I had to buy second one larger!! But so angry that one’s topIs worst than smaller one and top is useless!!!Had to finally just except not to use that with a top! Serious problem with zippers and that leaves no option!!!They should fix the doors and tops if you expect any length of time to use them properly. Cause of zippers!! Doors make safe place impossible!Top option lasted closed only once. That’s when I realized just how cheap their zippers are!! Lucky if you take off that you can put back on! Certainly they knew this? What good is a pen if you are afraid to use its doors? What good is a top if it is so easy to break? I would not recommend for any large or medium dog! Or expect any longevityFor doors or tops!!!! Company should fix this cheap zipper problem!!! I expected them to work!!!Only reason small works is after door brokeI never took off too!!! And larger one I again have toJust put her in the open top!!So advertised for use inside and out well only without top and leave cheap door closed and outside forget it if you want any shade or safety concerns!!! Honestly the second large different brand is no better just more expensive and perhaps a lot sturdier that’s 3 now. And no 3 was twice the price!!!! With still the sticker roll up door is same!!!Top looked oval on number 3!!! And was hard to put on octagon shape so I think they all should fix that cheap zipper problem!! We love our dogs and deserve better. Instead of compromise cause you can’t fix their flimsy zipper as I tried!!! And top option to be safe just never open!!! Forget taking down and putting in a bag! Unless you are extremely lucky ?! If door zippers don’t break or top don’t ! It’s not safe! And even last number 3Has same two zipper roll up and stick! Door!I watched a video on one with tiny round bag that I wanted to get but lost where I saw it. Maybe from video that one might be better? Might have well built zippers? Mane check that guy out and it’s details might be better. Or live with only a few weeks without options!!! Cause you can’t fix the cheap zippers! For tops or doors!!!That’s what they are and longevity is no option!None!