Como dizer "Produtos de grande demanda" em inglês

I would think...

staples = produtos de consumo quotidiano, como pão, leite, sabonete, papel higiênico, etc.
high-demand products = produtos de grande demanda

Staple items are usually high-demand products because they're used every day. But you can have high-demand products in niche markets as well. For instance, according to a hair wig vendor, Brazilian hair is a high-demand product in his business. But it's not a consumer product that's used every day, so it's not a staple.