Some online shops are beyond vague; very annoying. I spent some time on the phone yesterday to one trying to establish whether the colour of a fabric was in fact black or navy; it read black on my monitor but is in fact blue. Don't usually have that problem with my monitor so assume it's their bad photograph. Also I wish websites would specify fabric content better, especially knits and jerseys. I'm at that age where I won't wear synthetics so poly anything is out. Just describing something as 'jersey' or 'knit' doesn't help, so they don't get my pennies.
I'm assuming that blogger is very inexperienced in choosing the correct fabric for a project. I've certainly done that but wouldn't post pictures on the WWW for everyone to see.