If you want to add a bit of weather protection to your iPhone, try the Otterbox Defender case http://www.otterbox.com/iPhone-4S-Defender-Series-Case/APL2-I4SUN,default,pd.html?dwvar_APL2-I4SUN_color=20&start=1&cgid=apple-iphone-4s-cases It adds bulk but no real weight and you can access all the functions with the case on. The screen is a bit less sensitive in the corners with it on but still usable, the rest of the screen well you wouldn't know you had it on. I haven't tried it in really bad weather yet (curse this sunny Australian weather :-) but it looks like it should be ok. You can get them in a camouflage cover, just don't drop it.