I looked at the web site and noticed that the sheets are 50 Cotton/50 Poly. I have very sensitive skin and lots of skin allergies. I have to use 100% cotton, preferably a high thread count for softness.
I like their pocket design. I have been sewing as long as I can remember, and I think I could duplicate the idea starting with flat sheets. I made something similar about 10 years ago for our first AS, but it involved velcro.
Thanks for the information and I hope you enjoy your new sheets.