NASM--Apollo to the Moon--Apollo Space Suit, Model A7L

APOLLO SPACE SUIT, MODEL A7L
This space suit type, used on Apollo 11, with an attached primary life support system (PLSS) weighed about 81 kilograms (180 pounds) or 13.6 kilograms (30 pounds) in the reduced gravity of the lunar surface. The torso is custom-fitted with convoluted joints at the shoulders, elbows, wrists, hips, knees, and ankles. Entry to a suit was through a rear pressure-sealing zipper that ran from the upper back through the crotch. The suit was made from 25 layers of protective materials.
An Apollo lunar explorer needed to be able to walk over the rugged terrain of the Moon in a pressurized suit, pick himself up unaided should he stumble, and perform work requiring manual dexterity. All of these criteria led to a design of a self-contained, light, flexible suit, but one sturdy enough not to rip or tear, during rigorous activity.
The space suits used by Neil A. Armstrong and Edwin (Buzz) E. Aldrin Jr. during their historic July 20 and 21, 1969, walks on the lunar surface, had to protect against space hazards and yet allow the astronauts mobility and dexterity.
The suits protected astronauts against micrometeoroids and temperatures ranging from -150 degrees C to +120 degrees C (-250 degrees F to +230 degrees F).

Early Material Research for Space Suits