Long Distance Hiking

[Grunthos]

Acrylic is 100% polyester (actually polyacrylonitrile). So "poly" = "acrylic".

Actually, no, this is incorrect.

Polyester is a class of materials, the most common being polyethylene, and acrylic is not one of them. Polyesters all contain an ester component, which is a hydrocarbon chain bonded to an oxygen. http://en.wikipedia.org/wiki/Polyester is a good start.

Acrylic has no ester component; it is C₃H₃N. Polyacrylonitrile is simply not a member of the polyester class, and "poly" absolutely does not equal acrylic.

"Poly" as a name is, hands down, the MOST USELESS label for a material. But most often, it is referring to polyester, which is most often polyethylene.