What is EVA material ？

Material characteristics
Ethylene-vinyl acetate (EVA), also known as poly(ethylene-vinyl acetate) (PEVA), is a copolymer of ethylene and vinyl acetate.
EVA is an elastomeric polymer that produces materials which are "rubber-like" in softness and flexibility. The material has good clarity and gloss, low-temperature toughness, stress-crack resistance, hot-melt adhesive waterproof properties, and resistance to UV radiation. 
Application scenario

Safety and environmental considerations
Polyethylene vinyl acetate has recently become a popular alternative to polyvinyl chloride because it does not contain chlorine.[13] As of 2014, EVA has not been found to be carcinogenic by the NTP, ACGIH, IARC, or OSHA, and has no known adverse effect on human health.