EVA has superior elasticity, offering higher rebound and resilience in response to compression. Both products have a high level of chemical cross-linking, giving them superior stability, tear strength and waterproof properties compared to (cheaper) non cross-linked Polyfoam EPE products. The closed cell structure of EVA foam makes it impermeable to water and moisture-intrusion, to fungi, bacteria, and to air. Featuring high thermal resistance, it is light in weight, flexible and compressible, and has moderate to good recovery after long-term compression.