What were World War 1 parachutes made of?

World War I parachutes were primarily made of silk, which was lightweight and strong, allowing for better deployment and stability during descent. The silk was often coated with a rubberized material to enhance durability and resistance to moisture. Additionally, the design included a simple round canopy, which was effective for the technology of the time. As the war progressed, other materials like cotton and linen were also used due to supply constraints.