Coarse stuff. Cheap and useful, but clothing made of polyester threads is not as comfortable to wear as garments made of natural fibers. Polyester fibers have been used in the manufacture of cheaper clothing lines for decades and with a chuckle I remember in particular one pair of 100% poly pants owned and worn buy an unnamed member of this family. After finally being rejected for their lack of style and worn condition they were tossed into a bag of clothing intended for donation and forgotten. Some years later, our daughter, who we at times fondly and mockingly refer to as a 'fashion nazi', found them when going through the bag looking for rags. She held them out with clear disdain and wondered aloud "how many polyesters had to die to make these pants?" I think of this 5 days a week when I go for treatments at a local hospital where those ubiquitous open-in-the-back hospital blue gowns are supplied for patients. There are stacks of them in 2 different designs in each dressing room, a Tic Tac Toe printed pattern and a Pick Up Stick-like design. Pick Up Sticks are decidedly more comfortable than Tic Tac Toe and after checking the labels I discovered the unsurprising reason. A full 20% fewer polyesters had to die in their manufacture. Pick Up Sticks are hard to come by and disappear quickly early in the day. Others have also discovered they are more comfortable to wear as the stacks of them shrink more quickly than the stacks of the less comfortable Tic Tac Toe gowns. My daily 1:15 appointment makes it hit or miss as to whether or not I'll be playing Pick Up Sticks or Tic Tac Toe. Like Joshua, the computer in the movie "War Games" that learned it couldn't win at Tic Tac Toe, I've never had much luck at winning when playing Tic Tac Toe. Joshua suggested "Chess" - I'll stick with Sticks.