Material For Making Rain Boots

　　 Rubber tree Originally a plant in the Amazon basin, Columbo first reported that Haiti residents played with a ball made of elastic resin from trees. latex From this "trefoil tree" cut out, the emulsion will be hardened on fabric and made into a simple raincoat. Local residents even pour latex on their feet and legs, and become a rain boot after drying. However, before the invention of vulcanization of rubber, the use of raw rubber is still very limited, because its strength is very poor and elasticity is difficult to recover.

This should be the most primitive. Boots Right.