The exceptional strength of rubber at extreme temperatures ensures unparalleled thermal insulation against heat and cold.
- Only rubber resists to contact heat up to 300°C and allows footwear to meet the HRO standard.
- Heat-insulating (HI label, tested at +150 °C)
- Cold-insulatin (CI label, tested at -20 °C)
Unlike PU soles, rubber soles are inert to hydrolysis and are therefore easier to store.
Indeed PU soles are made up of long chains that can be broken by moisture. Thus, the storage of safety shoes with PU soles in basements, sheds or garages that often subject to high humidity accelerates the aging of the shoes.
Safety shoes with rubber soles are therefore also suitable for areas with high humidity and especially in tropical climates.