This is a good quality serger thread that is not expensive like some of the other thread brands like Madeira.  You also get more thread on the cone than some of the expensive brands - 3000 yards.  The yarn is 100% polyester but feels like cotton.  I've had no problems with thread breaks and its not too "hairy" which makes threading the needles and loopers easier.  Maxilock places a product label inside the bottom of the cone so you can easily identify the color and dye lot of the thread when you need to purchase more.  The thread doesn't slide off the spool so you don't need to use thread nets to keep it under control.