Nylon is not an expensive material.
on my opinion. nylon fabric is expensive than cotton because of the processes the nylon under goes and for the fact that nylon is a synthetic sustitute for cotton thus it uses synthetic matterials which adds up the cost of the nylon fabric
Nylon is very cheap to make so therefore it is a lot cheaper to buy.
is oil cheap or expensive
Its expensive
its expensive
because its an alternative to the expensive material silk
Expensive, costly, precious, priceless, or valuable. Those are opposites of cheap.
expensive
expensive opulent, expensive, pricy, highbrow,
or
Cheap
It isn't "cheap" but it isn't as expensive as oak.