In general, the material you require depends on the properties you need. (Synthetic) rubber or Thermoplastic Elastomers (TPE's) have both their specific properties.
When resistance against UV and Ozone influence is of importance (use of material outside during longer periods), properties of the material can be adapted. Extreme heat or cold? Chemicals? Dutch Dipping can offer any specific resistance on customer demand.
TPE's are easy to colour: fluorescent, metallic and pearl effect, glow in the dark.