About: http://webisa.webdatacommons.org/411704265

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	They improve insulation, especially in layers or in combination with another type of window treatment.
http://www.w3.org/ns/prov#wasQuotedFrom	habitardesign.com