When contestants are invited onto The Amazing Race, they aren’t told what to pack. Hayley Keel, who competed in Season 26 of the series, told She Just Glows that she was completely in the dark when it came to what to bring. “Before the race, I’d sit around watching YouTube videos, like ‘how do you pack for a backpacking trip for a month in different climates,’ and I’d pack and repack.” However, contestants are told what not to bring.

Source: https://www.distractify.com/p/what-are-amazing-race-contestants-allowed-to-bring