The paper within the web notebook is 90 g Ivory Brushed Vellum
Leatherette cover with an elasticated strap
Coloured ribbon and an expanding pocket at the back for loose documents
The Clairefontaine 90gsm paper is known for being extremely high quality and great for fountain pen users. It is pretty much the standard in the fountain pen community.
I believe that the paper is coated in fine ceramic, which makes it super smooth to write on. it is worth pointing out that the paper is not bright white, but more of a yellowish, cream colour.