This simple little cloth makes life much easier when ironing - essentially you can just turn the iron onto 'Cotton', turn the steam up to full and iron away! It prevents shiny marks on dark garments, and minimises the marks where layers underneath show through. I used one of these all the time when my children were younger, as lots of their tee-shirts and sweatshirts had logos which melted - not with this little cloth.
I recently took one of these on a cruise, and on formal nights, where we were all trying to press crushed evening wear, everyone was most impressed with it, and I nearly 'lost' the ironing cloth several times!
I still have a similar one, but bought this twin pack, one for my daughter to take to university and one as a spare - but I'm sure it will be passed on to a friend before too long.