Nylon fibres are very strong in the following ways:-
1) It is used in making ropes which are used for climbing rocks.
2) It is also used in making parachutes.
3) It is used as bristles in toothbrushes which provide flexibility and remains strong against water forces.
4) It is used to make fishnets which can remain strong and prevent the fish from getting released into the water.
5) Nylon wire is used in electrical appliances because it proves stronger than steel wire.