Should you wear a base layer under your jersey in summer as well as winter? We quiz the experts – and start a heated debate

You’ve seen it on mountain stages of the Giro d’Italia, Tour de France and Vuelta a Espana. As the sun beats down and riders push themselves to their physical limits, they unzip their jerseys. Some reveal an emaciated bare chest; others show off a base layer beneath the jersey.

But who’s got it right?

When it comes to the question of whether you should wear a base layer under your jersey when the mercury rises, we couldn’t even reach agreement among the few people who work in the Cyclist office, so we decided we needed to investigate the pros and cons more closely.

Source: Should you still wear a base layer in the summer? – Cyclist