Fabrics can only be dry cleaned.

Songdream The Zhang Ji used in, was friction tested in a public institution that can be fairly evaluated (Kaken Test Center *) : JIS L 0849 Type 2 (Drying) and received a Grade 3 or higher evaluation.

* General Incorporated Foundation Kaken Test Center Is a public interest corporation, acting as a fair third party in government delivery and general business transactions. Government agencies such as the Ministry of Economy, Trade and Industry, the Ministry of Justice, the Ministry of Korea, the Ministry of Health, Labor, and the Ministry of Land, Infrastructure and Transport are also subject to inspection.