. ..... ..... EUROPEAN STANDARD EN471 High-visibilty warning clothing for professional use - Test methods and requirements This European Standard prvides a solution that enables the major issues to be resolved. The performance of the conspicuity materials to be used in "high visibility clothing" is specified togerther with minimum areas and piacement of the materials. I do testing to wash 50 times by 90 degrees in us. Many holds the manufacture that a lot of EN471 reference is passed in addition to above in us. Copyright (c) 1968-2004 by Ref-Lite Co., Ltd. All rights reserved.