Notwithstanding its somewhat dire-sounding name (ironic, we hope?), the Ikarus's seat is made of durable water- and weather-proof polyester. The wings are detachable and made of spinnaker nylon, which, while cute as all get-out, are not guaranteed to be reliable if your little one flies too close to the sun.
(If you've always wondered how to hang a swing safely indoors, there are some good tips here.)
$42.75 at Padilly