Tour de France champion Chris Froome and Team Sky's 'marginal gains' philosophy backfires in South Africa Team Sky declined to comment on Thursday but it is understood that the material on the suit is the same as that worn by Team Sky during last year's Tour de France and the issue was one of failing to apply the correct suncream. Nevertheless, rival team manager Jonathan Vaughters of Garmin-Sharp joked that Team Sky's rivals had discovered Froome's Achilles heel. Aha! We've found his weakness," Vaughters tweeted. Now on to manufacturing motorized ultra violet ray guns for the TdF