Sauna hat : Made of 100% natural terry linen.  Natural linen strap sawn inside filled with natural fine Baltic Sea amber.  In contact with human body (head), amber warms up to 26 degrees C and releases its healing properties: improves blood circulation, strengthens immune system, stimulates brain activity, relieves stress and anxiety.  Maintenance: can be hand or machine washed at 30-45 degrees. Use eco detergents. No ironing. Product specifications: 31 x 21cm, weight 118 gr.