If you're reading this in a pair of jeans and flip-flops tucked under your office desk, be assured that your boss considers you to be at the height of creativity.
In a new survey, seven in 10 employers said that 'dress-down' days were having a beneficial effect on employee performance, while half believed that formal clothes had a negative impact on staff.
The number bosses reporting a positive effect on work performance is up from just over 50% five years ago.
Staff also believe that they reap the benefits of casual wear: the survey found that 88% felt more at ease in casual clothing and 63% found formal dress codes at work restricting.
Peter Done, managing director of employment consultancy Peninsula, who carried out the survey, said: "Dress-down days in the workplace are proving to be an effective tool for employers to increase productivity in the workplace, and are proving popular with employers and employees alike."