I will, and frequently too, and so will close to 80% of Americans in all demographic groups, who will wear an old t-shirt that was most likely acquired during a vacation, says a survey from BlueCotton and Synovate in 2009, among 1,000 US adults.

Altogether, about 80% of the survey respondents still have an old t-shirt, and those that were bought during a vacation are their favourite. It was also found that shirts given by an employer, from a concert, a favourite pro or college sports team and a charity run or walk are also very popular and favoured.

These respondents that are most likely to keep old t-shirts are mostly between the ages of 18 and 24, of whom about 7% say they have not kept an old t-shirt, while just over 70% of respondents age 65 and more still keep their old t-shirts.

Additional findings:

• T-shirts acquired as a sports spectator were more cherished than t-shirts acquired as a sports participant.
• Men are more likely than women to keep a t-shirt from a pro or college sports team.
• Concert t-shirts are most popular among the young.
• T-shirts from a church event were more popular among women than men.