Oddly enough, some companies give employees unlimited paid time off, claiming the offer boosts productivity. Often referred to as "endless summer," the break typically combines vacation, sick and personal days without any set limit. The Society for Human Resource Management found that 1 percent of companies offer unlimited paid time off. Workers don't take advantage of the offer, businesses say. "What we see in some cases is a portion of the population taking less time," a manager of compensation and benefits for SHRM said. More often than not, he added, workers take about the same amount of time off as those with traditional paid-time-off benefits.