Follow the instructions from the backside of the FARTØJ label 

"I'm natural - I shrink”: FARTØJ is made from natural elements and will therefore automatically shrink a bit when you wash the garments. We recommend that you gently stretch the clothes wet to prevent the shrinking. 

The designs can be washed at 40 Celsius degrees, but we recommend 30 degrees.  - FARTØJ is made of hemp and works antibacterial, and you don't need to wash that often. Let FARTØJ air-clean and save the water. 

FARTØJ cannot be tumble dried. This destroys the garments - please let is dry in the air.