SAN FRANCISCO – March 18, 2014 – Kenu, the makers of Airframe, have released the 2nd generation Highline for iPhone 5/5S. Highline is a clever security leash and protective case system that provides peace of mind while taking photos and video in the most precarious situations; on a chairlift, whale watching, zip-lining or entertaining your child. SAN FRANCISCO – March 18, 2014 – Kenu, the makers of Airframe, have released the 2nd generation Highline for iPhone 5/5S. Highline is a clever security leash and protective case system that provides peace of mind while taking photos and video in the most precarious situations; on a chairlift, whale watching, zip-lining or entertaining your child.