Are those luggage bags the sell good for keeping bedbugs out of clothes?

Pesticides, vacuum.: Eradication of bed bugs frequently requires a combination of pesticide and non-pesticide approaches. Pesticides include pyrethroids, dichlorvos and malathion. Resistance to pesticides has increased a lot over time, so mechanical approaches such as vacuuming up the insects and heat treating or wrapping mattresses have been recommended.

Maybe - Maybe not: Cimex lectularius or the bed bug is a parasite that is nocturnal. It can be transported on your clothing, luggage, second hand furniture etc. You can even get it using public transportation. It can go up to a year without feeding, so that allows it to just sit and wait until it catches a ride on something or someone.