Does anyone wear a bonded system that lasts a few weeks at a time? Only I will be shaving the res of my hair off in January/February and hope to God it stays on and doesn't come off until I take it off. Also, can you really have hot summer holidays on a beach and sweat and will it still stay on!! Would really appreciate your views to all the people wearing a bonded system. Any tips would be great, many thanks all :-)