Yes, thank you Sister Amy.
Also, do you know or have you heard, is wearing a burqa really uncomfortable in the heat? I just picture these poor women sweating to death in 90 degree heat having to wear all of that! But, maybe it’s a breathable fabic

or maybe they don’t go anywhere in the summer so they don’t have to wear it.
In the Eastern Province of KSA, the women wear an abaya. This is always black. It is a garment cut and sewn in such a manner as to completely disguise whatever shape the person is underneath. The abaya has two veils attached for face coverings. Both veils are used when going out in public while only one in the home and there are men not from the family present. (such as when serving her husband’s guests). Underneath, at least traditionally, there were 7 layers of clothing, from bloomers to the outer dress. I know because I used to have a complete outfit that was made for me. Yes, it was incredibly hot. In addition, summertime in KSA is not 90 degrees. That is spring. It was normally around 112 - 118 on the coast and 118-120 or more in the desert. With one veil down, breathing was restricted. With both down, it was downright stuffy, plus had the added effect of keeping breath heat inside the garment, sort of like when you pull your covers over your face and breath under the blankets.
Many KSA women also suffer from poor eyesight as a result of years of trying to see through two layers of veils heavy enough to hide the face. They are as hard to see out of as to see into. On the plus side, I reckon their incidence of skin cancer is just about nil.
I didn’t have to wear my abaya when I went out but I did wear long sleeved, very loose, flowing Arab dresses when I went into town. Covering the skin from the sun, while still allowing air to circulate is actually cooler than exposing the skin.
Things have changed a lot since I was last there and many many shops now have air conditioning. No shops had air-conditioning when I lived there. Now, the only time they are exposed to the heat is in-between shops. Plus, they have an equivalent of a ‘siesta’ time in the afternoon when the heat is the worst. After the sun goes down, the shops re-open. The abaya is not nearly as uncomfortable then.
As for the original OP question, I think it is cultural which version women choose to wear. In Afghanistan, they favour the burqa, while in KSA, the abaya and the niqab. It also varied between Eastern Province or the West (Makkah, Jeddah, Taif). In the west of KSA, the veils were more of a mask with eye-holes so vision wasn’t impaired as badly. Iran favours the chador.
http://photos.igougo.com/images/p182001-Abaya.jpg