How to avoid getting sick in Off season

There are no excuses of not going out for training because of the boring grey, coldish and rainy weather, you can always put your “rain clothes” on and go for a run or ride… just a short one is also ok… put some good clothes on, and don’t get cold and risk of getting sick… Without my Fusion Zero Degree clothes on the mountainbike, I would not manage ;-)
This I ment as advice more than commercial ! So try this one, or anything like it.