Jarsh, a Hyderabad-based company set up by a team of engineering graduates, has reportedly designed an air-conditioned helmet that can be used by people working at cement, steel and construction sites. The company officials reportedly claimed that the helmet is powered by a rechargeable battery. Weighing 250 grams heavier than the conventional ones, the helmet costs Rs 5,000, said Kausthub Kaundinya, Chief Executive Officer, Jarsh.