Can I get this overnighted?

Dear customer, These sachets are fulfilled by amazon. Usually it takes 2-3 days to ship. In addition, you can pay extra moeny to expedite it.

How many of these do you have to throw in your cloths for the scent to stay

Hi,our this MYARO scented sachets have 12 pack in one package , about your question , it depends on the size of your closet , if it is bigger , maybe you need 3-5 packs , if you want smell more stronger , you also put more . Hope this answer can help you !

I'm looking for the 12 packs of the other 3 scents but can't find them. Are they available on Amazon?

It would seem that the other scents are not on offer at the moment. You could write to the seller PeBeauty Familife via the Amazon Help Link http://www.amazon.com/gp/help/customer/display.html?nodeId=200465390

Once it lose its smell should they be put out into the sun?

No these aren’t the deodorizer you’re thinking of that needs to be “recharged”. This is just a fragrance pouch. When the scent is gone it’s just gone.