pale pink poppies

They almost look as if they are made of taffeta.

Yes, they do look like taffeta. Amazing to think that they (and all their bright pink and orange relatives) came out of the same packet of seeds!

These are beautiful CS. Are they Oriental poppies, they look too sturdy to be annuals?

Yes, they are Oriental poppies, M. Grew all the poppies I have from seed a few years ago. Got several different colours.