Madeira Aerolock No. 125 is a high quality overlock yarn that is tear-resistant and durable yet supple. It is made of 100% polyester, washable up to 95 degrees and can be tumble dried at a low temperature. A King Spool Madeira Aerolok No. 125 has a running length of 2,500 metres. Comes in #8111 grey colour.