Thanks for your detailed comment, The Wizard of BC. I was aware that fabric is light (which is fine for hot summer) and that this will cause problems. Apron is tapperd but not enough ; just a bit.

I also noticed that if I make the lining of apron nerrower that apron itself, it helps. I made apron and underapron in double fabric (lining) to add weight.

I will sure PM you for additional advice.

Thanks again!