Exhaust manifold blankets are typically made from high-temperature-resistant materials designed to withstand extreme heat and protect nearby components. These blankets are composed of multiple layers for optimal insulation:

1. Outer Layer: The outer layer is usually made from heat-resistant silicone, fiberglass, or aluminized fabric, which helps protect the blanket from external wear, abrasion, and moisture.

2. Insulating Core: The core is often made from high-temperature insulation materials such as ceramic fiber, silica fiber, or basalt fiber. These materials are chosen for their ability to resist temperatures up to 2,000°F (1,093°C) or more, providing effective thermal insulation to contain heat within the exhaust manifold.

3. Inner Layer: The inner layer is designed to withstand direct contact with the manifold, typically using stainless steel mesh or woven glass fiber to provide durability and maintain structural integrity under extreme heat.

These materials work together to reduce under-hood temperatures, improve engine performance, and protect sensitive components from heat damage.