Unofficially though, it's the dress code at Ramlila Ground. Hundreds of supporters of anti-graft crusader Anna Hazare can be seen sporting the Gandhi cap with the message 'I am Anna Hazare' printed on it. Along with the national flag and various other social messages, the cap has become the symbol of the protest.
So, it's no surprise that hawkers are doing brisk business selling the cap. But the good run might be cut short because the hot-selling product is fast running out.
On Saturday, most hawkers outside Ramlila Maidan said almost everyone coming to Ramlila Maidan is buying the cap.
"They are running out fast. I sold 100 caps yesterday and have already sold over 50 today," said Gopali, a hawker, on Saturday afternoon.
"I sent my son to get more caps from Sadar Bazaar but they are no longer available. More orders have been placed. Let's wait and see if we can get more by this evening," she added.
The hawkers were selling each cap for Rs 10. But caps being sold at the counters set up by the IAC were sold for Rs 15 per piece. Today, even their counters were running out of the caps.
But unlike yesteryears, the caps have proved to be a bigger hit among the young than older people. Wearing T-shirt with jeans or shorts, these youngsters are now putting the cap on their heads as a statement.
"I just want to show my support. It's not about how I look, but what I'm saying. But I must admit, I think it looks quite cool," admitted Siddhant Mehra, a student of Delhi University's Hindu College.