Tempest fabric is Bioracers answer to all weather conditions Belgium has to offer.

It is windproof and water resistant. It is warm enough to protect against cold, wind and rain but at the same time light enough to prevent the rider from overheating when temperatures get warmer. 

This protection is a characteristic of the material itself, not a treatment that will wash out with time. So no need to re-treat your jersey in the future; your jersey will remain consistently awesome.