Clothing for a long drive and what becomes uncomfortable
Short answer: In the car waistbands, seams and a lack of air become the irritation. All three are felt after two or three hours, not when you got in.
The waistband after three hours
A waistband that was fine standing cuts when sitting. A wide, soft band works in both positions. See bamboo underwear for men.
No air circulation
Your back against the seat gets no air. A material that passes moisture on makes the whole difference there. See bamboo T-shirts for men.
The legs swell
Sitting still for hours, fluid collects in the lower legs. A stocking with even pressure can help. See bamboo support stockings.
Stop and walk
No choice of clothing replaces getting out and walking for five minutes every hour. See all bamboo socks for women.
Change on arrival
If you have sat all day, a change does more than anything else. See washing and care.
Frequently asked questions
Why does underwear become uncomfortable in the car?
Because waistbands and seams press differently sitting, and because there is no air circulation.
Why do legs swell on a long drive?
Because the calf muscle is not working, and the fluid therefore collects in the lower legs.
How often should you stop?
Every hour. Five minutes of walking does more than any choice of clothing.