(Only if elastic fiber present)Test in stretch direction only:Elastic fibre content :1-5% : measure growth after 60 minutes. Pass or fail based on growth. Growth maximum 7%6-9% : measure growth and recovery after 30 minutes. Report both growth and recovery. Pass or fail based on growth. Growth maximum 5%Equal or >10% : measure recovery after 30 seconds. Pass or fail based on recovery. Recovery minimum 85%