The Suunto EON Core is made of different materials:
- The case is made of reinforced composite
- The bezel is made of composite
- The glass is a mineral glass
- The buttons are made of stainlees steel
- The strap is made of elastomeer with stainless steel buckle.
See more about the the Suunto EON Core Key Features and Specifications on the product page http://www.suunto.com/Products/dive-computers-and-instruments/suunto-eon-core/suunto-eon-core-black/