Microfibers for perfect cleanliness The new B+W microfiber cloth provides high cleaning efficiency and is especially suitable for coated optical surfaces such as photo filters and lenses. Thanks to its size of 30 x 30 cm and its flat surface without eleva-tions, it is easy and efficient to use. The cloth is washable up to 40° C and should be washed by hand after being used about eight to ten times with a mild detergent and rinsed thoroughly. The cloth is supplied in a sturdy case.