What is the definition of the word PORTERS as used in the two passages from the text "Blast From the Past?"

Through a travel agent in Bima, a city on Sumbawa, a friend and I hired a guide, a translator, a driver, a driver’s mate, a cook and six porters.

The climb was a chance to reassure myself that after treatment for two kinds of cancer in the past decade, I could still master such a challenge. For me, then, it was a test. For the two porters, striding along in flip-flops, it was a pleasant stroll in the country.