Carrying a NEX 5n (storage and usage) while cycling

Look at the Cotton Carrier product line at http://www.cottoncarrier.com/

I have used their StrapShot for about two years - well built.  They are popular with hikers and skiers too. I wear it under a custom vest that my wife made so it doesn't look so geeky. It supports much bigger cameras too (like my Canon 7D & lens). You have fast access to camera and a really secure fastening (when attached to their mount).  For 'on the go' biking/shooting, it's probably safer than any other storage method.   - John C.