I love these pants! They are super loose and comfortable.  I had several friends ask where I got them and if they could get a pair.  I was sad to report that these were plus size, so my friends would all need to gain some weight to wear.  Ha! However, i did find some similar ones in the regular one size fits all.
Fit-wise though, I usually wear about a 14-16 and they were a great fit.  However, I would not recommend to anyone over maybe an 18-20, because they would probably be too tight.  Lets be honest, one size fits all is not really accurate.
The fabric is light and airy, but not see through.  The elastic does not cut at the waist and they have a nice thick waistband, eliminating muffin-top, which is always a concern with elastic waist items. I think i just found my summer lounge pants.