I have to buy a crib bedding set but they r all kind of not a very soft material. What material should i buy?

Thank you for your question! Honestly, that was a concern of mine when I was shopping around for bedding for my daughter when I was pregnant!  But really, what you may think is too rough or not soft enough, once you wash it with a nice gentle detergent and use some fabric softener and some dryer sheets, they really do soften up alot! Besides that, it is not good for newborn babies to lay in very plush bedding. However, for a nice soft blanet, maybe get a soft fleece or velour blanket, or get a hand made baby blanket that was made with a really soft yarn!
Check out Baby Super Mall, they have literally hundreds of baby bedding and supplies! They have every option available to coordinate with any theme you can think of!