I'm also making my own line of "active wear" (which, of course, will be the MOST fun part of this whole adventure).
And I am breaking in several pairs of sneakers/walking shoes (something other than flip-flops). I have some brand new Nike's (still in the Zappos box). And another pair that is more comfortable....but looks disgusting.
Then, I found this advice -- about how to to whiten white sneakers.
Hand wash with baking soda
- In a small bowl, mix 1 tablespoon of baking soda, one-half tablespoon water and one-half tablespoon hydrogen peroxide to create a smooth paste.
- Gently brush the mixture into the shoe’s surface with an old toothbrush, just firm enough to work out any loose dirt and work the paste in.
- Brush on a second coat of paste.
- Stir the shoelaces into the remaining paste mixture.
- Set your shoes and laces in the sun for 3 to 4 hours, or until the paste is dry and cracking off. The brighter the sun and hotter the weather, the whiter and brighter your shoes will get.
- Brush off any excess paste and re-lace. Your shoes should be many times whiter than before!