Material: EVA
Ethylene Vinyl Acetate (EVA) is widely accepted as safe for use in shoes and teethers. EVA is a type of plastic that does not require a plasticizer and is BPA-free, so it is considered to be a safer alternative material. ... The Center for Health, Environment and Justice (CEHJ) recommends EVA as a safer PVC-free plastic alternative.
The calorific value of EVA is similar to that of oil. So you can say that EVA is rather environmentally friendly.
