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Oliver Keel, employee of the development department at TB Safety and son of General Manager Niklaus Keel, wears a ventilated protective suit by TB Safety, which is equipped with an integrated hood, pictured in Frick in the Canton of Aargau, Switzerland, on November 26, 2014. The ventilation is provided by ambient air which is drawn into the suit by two filters, therefore no additional mask is needed. Due to the intensive air ventilation a slight overpressure is created in the suit which prevents excessive transpiration and heat accumulation. (KEYSTONE/Gaetan Bally)