A caravan member is heading towards the U.S. border wearing a T-shirt depicting President Donald Trump as a clown.

The Central American migrant was snapped in a bright blue shirt with an image of Trump wearing a red clown nose and holding two thumbs up - a symbol of defiance as the president sends troops down to the border to block the caravan.

The phrase 'I support' above Donald's name is scratched out on the shirt and instead displays a play on a well-known Mexican phrase saying: 'Donald el que lo lea' which translates to 'Whoever reads this is Donald'.

A boy traveling in the Central American caravan has been spotted wearing a Trump clown T-shirt with the phrase 'Donald el que lo lea' which is a play on a well-known Mexican phrase meaning 'Whoever reads this is Donald'

The T-shirt was made by a Mexican craft brewery and actually changes messages with heat. In the cold the shirt looks like a pro-Trump shirt reading 'I support Donald'. When exposed to body heat or warm temperature it changes to 'Whoever reads this is Donald' in Spanish and places a clown nose on the president's face

The photograph was snapped as the caravan took a stop at a shelter set up in Mexico City on Thursday.

But there's more to the T-shirt than meets the eye. The words on the shirt - created by Cerveceria de Baja California Brewery - change with heat.

When it's cold the shirt reads 'I support Donald' in English depicting Trump without the clown nose. But with body heat or exposed to warm temperatures the words change to the same message on the boy's top 'Donald - el que lo lea', according to Vice.

The migrant boy is just one of some 5,500 migrants taking part in the massive caravan that began their arduous journey in Honduras on October 13 and arrived to Mexico City on Wednesday.

Mexico City authorities said that 4,841 registered migrants are receiving shelter in a sports complex in Mexico City. Of those registered migrants, 1,726 are under the age of 18 and 310 children under five.

On Thursday some migrants demanded buses to take them to the border saying that it was too cold and too dangerous to hitchhike the rest of the way.

Central American migrants heading towards the U.S. passed a dummy of a devil on their way that held the sign 'Trump no militarization', referring to the president's decision to send troops to the border

Some 5,500 Central American migrants are in the caravan that started on October 13 in Honduras. On Thursday the caravan took a rest stop at a shelter set up at the Sports City stadium in Mexico

The migrants line up for food at the shelter set up at the Sports City in Mexico on Thursday

The group is now about 600 miles away from the U.S. border in McAllen, Texas

Migrants pictured charging their phones at a charging station during their rest stop. Thursday night the group will decide which route they will take to head to the U.S.

'We need buses to continue travelling' caravan coordinator Milton Benitez said noting that it's colder in northern Mexico and unsafe as they enter drug cartel territory.

He said the route and departure time would be decided at a meeting on Thursday night.

Mexico City is more than 600 miles away from the nearest U.S. border crossing at McAllen, Texas.

The Mexican government has said most of the migrants have refused offers to stay in Mexico, and only a small number have agreed to return to their home countries.

Migrants wrestled in their spare time at Sports City in Mexico City as they waited for direction from caravan organizers

Red Cross stands were set up to tend to the sick members of the caravan on Thursday

Charities handed out gloves and other necessities at the caravan as they head towards the border and into colder climates

About 85 percent of the migrants are from Honduras, while others are from the Central American countries of Guatemala, El Salvador and Nicaragua.

As the caravans sort out their paths towards the U.S., Trump has been sending troops to beef up security at the border.

President Trump has promised a 'tent city' to house detained migrants and says he will not engage in 'catch and release' like his predecessors.

He has repeatedly labeled the caravan an 'invasion' and has come under intense scrutiny for his rhetoric on the subject.