The Cat Sack with Underside Zipper Large

Does this scare the cat and make him go wild?

Does this bag run true to size? The description states the Large size will fit cats 10-15 pounds. Is that accurate?

What are the washing instructions? Assume they are on bag but want t know before purchase

I am considering this for my 15 lb pug dog. Will it be the right size and does it secure the feet so they can't retract the paw for clipping?