Below is a great article about understanding the International Symbols for Washing Instructions!
Please see chart below for detailed description of Care Instruction Symbols provided on each item.
For more information on understanding care guidelines please visit reference links:
American Cleaning Institute: http://www.cleaninginstitute.org/clean_living/your_guide_to_fabric_care_symbols.aspx
Textile Affairs: http://www.textileaffairs.com/