1.Fiber that its made for and from
2.How the fiber is constructed into fabric
Ex. Cotton is just a fiber, it is used based off of how its made into fabric. Cotton can be knitted, woven, and woven into different manners.
Fiber and construction are 2 different things, both are important.
1.Woven Fabric
Woven fabric is a series of thread and another series of thread crossed over them. Woven fabric is found to be more stiff, and not flexible at all.
2.Knit Fabric
Knit fabric is one continuous thread looped upon itself to create fabric, knit fabric is more flexible, soft, and smooth.