Thank you for choosing this Hermès hat in denim.  It is made of organic cotton grown and harvested using environmentally friendly farming practices. Its blue colour is characteristic of a dyeing method that relies on a base of indigo, a natural colourant used for thousands of years. This traditional method lends the colour unique nuances, which evolve with time and use. The colour also has a natural tendency to bleed. A few preventative measures must be taken in order to preserve the beauty of this material over the long term :  

• If your hat is exposed to rain, let it dry naturally.
•  When you are not wearing it, store your hat on a flat surface or in a suitable hat box: this will  enhance the stability of its shape.   
•  Finally, we strongly advise against any kind  of cleaning. If you have questions or concerns,please feel free to contact your Hermès store.