Many of these mats on the market are coated with heat and water resistant material, allowing for steam, wet blocking and pressing. Many mats on the market can simple be rolled up when the user has finished working on their project for the time being and then be stored away safely and securely.
The charities have a lot of information on their websites, below is some general advice to help you get those needles clicking.
Early Angels: This is a site based in the U.K set up to help people to knit, crochet or sew clothes, blankets and other keepsakes for premature, low birth weight and sadly stillborn babies. They have a wide range of free knitting, crochet and sewing patterns accessible on their pattern page.
Yarn: Premature babies have very delicate skin and can often be allergic to wool; therefore it is best to steer clear of garments made with a wool mix. Acrylic yarn is more appropriate when knitting for preemies. Ideal yarn to use for preemie knits is baby double knit or 4ply yarn. Most preemie patterns will use these.
Knitting has always been not only a fun hobby, but a very useful one as well. Through the years knitters have enjoyed creating all sorts of projects; everything from sweaters and afghans to knitted rugs and toys.