uv filter

After inspecting rugs in many homes over the years, I have come to think that sunlight may be a rug’s principal nemesis—even to be feared, even, than moths. Sunlight streaming through a window directly onto a rug is virtually guaranteed to harm it, whether morning or afternoon, southern or western sunlight. Naturally dyed rugs and synthetically dyed rugs suffer equally. Colors fade unevenly and wool and cotton dry out and become brittle.