What type of upholstery fabric often requires dry cleaning?

Velvet and other high pile fabrics often require dry cleaning because they are more delicate and can be damaged by moisture and aggressive cleaning solutions typically used in wet cleaning methods. High pile fabrics tend to be more absorbent, making them susceptible to water stains and changes in texture when cleaned improperly. Dry cleaning utilizes solvents instead of water, which helps preserve the integrity and appearance of these fabrics while still effectively removing dirt and stains.

In the case of fabrics like denim, linen, and canvas, these materials are generally more robust and can often withstand water-based cleaning methods without compromising their structure or aesthetic. Hence, they do not require the specialized care that high pile fabrics do, making dry cleaning specifically necessary for those types of upholstery.