I probably couldn't sew a dress to save my life, but I definitely identify with being hot in those dresses! My first time in the temple, I had just started the pill and I was miserable. It made me hot, nauseous, and I had a migraine for a month. When I'm pregnant, I prefer to do initiatory work or sealings so there's not as much moving around to make me hotter. A cotton dress would be awesome. I think the sleeves are supposed to be to the wrist, but I'm not positive. You could probably ask the temple matron about it. I always giggle to myself because when I'm boiling hot, there's still always some little old lady who asks for a shawl because she's so cold.