Naish sprint ...very light .
did sail a few( recreation freeride sails ) neilpryde sails last year ...very light
so light I reckon you could fall through them ..
Id be looking for strong sails and average weight ..EZZY.cheetah .
if your looking for light ,look for ..less battens and free ride sails .
wave sails are built stronger ,so extra weight, although I think any thing under 6.0 is light .for me .
masts and booms ..the more carbon in a mast is generally lighter .