Professional Cleaning Cloth for Optical-quality Glass. Removes dust, dirt, and oil quickly 100% polyester, with Epicros E, which forms a permanent anti-static membrane Machine wash cold Durable and excellent absorbency Please note: this cloth is also available in size 170 x 150 mm, grey delivered in KK-Sets of Signature Primes and Signature Zooms (spare part, 50.0019066, contact sales for price informations)