Key Features :
i : This multi-purpose cloth eraser is versatile and made to last. Use on your devices, Dry erase boards or even glasses!ii : This multi-purpose cloth eraser is versatile and made to last.iii : Can be used on most surfaces; whiteboards, glass, devices and lenses.iv : Machine washable for a long lasting life.v : Environmentally friendly and budget wise!vi : 10 per pack, sold as 3 packs, 30 cloths total