A new kayak that can transform into a human-powered submarine within seconds gives paddlers a new, stealth means of transport.
Olivier Feuillette's Subo, the kayak-cum-submarine, includes a sealed hatch, oxygen tank, and a CO2 filter for dives of up to two or three hours. Once you're sealed in, your paddle becomes a distant memory—were you just kayaking?—and a swimmy, swaying rudder extends out the back to give you propulsion and a badass shark-like appearance.
Feuillette took a few years to realize this childhood fantasy—provided you're not claustrophobic.
Where would you take the Subo kayak?