Kickstarter campaign: http://kck.st/2psPItl (Ends April 21st) Airia Running of Sweden has released two products, aimed at performance oriented runners, during their Kickstarter campaign. They started the campaign around their lightweight racing flat Airia RAW and last week they added the BioSpeed Insole, an insole to improve biomechanical efficiency of any running shoe.  About two years ago Airia…