What were the suits made of that the astronauts wore on the moon?

The suits worn on the Moon were similar to those worn on space missions when an astronaut is exposed to space outside a vehicle. They are essentially portable space vehicles: environmental units, containing air, water, cooling, heating, a fishbowl helmet with silvered visor, and full micrometeor (armor) layers.

They have two layers, the inner enclosure and the heavy shielded outer layer. The suits were bulky, weighing about 200 pounds (90 kg) on Earth. In the reduced lunar gravity, the weight of the astronaut and his suit was much lower, so astronauts could hop rather than walk. The joints on the legs were not fully flexible at the knee. Astronauts compared the suits to "rigid clothing" with only the arms and gloved hands having good flexibility.

The lunar suits had about 6 hours of rechargeable use, and a 30 minute emergency supply of power and oxygen.