If you're a runner or if you spend a lot of time walking or hiking, you have additional foot considerations, such as blister prevention. Blisters can become a problem if there's friction in your shoes (make sure both your socks and shoes fit properly), and the problem can worsen with sweat and heat.
While a powder can help reduce the sweat factor, you'll need a product to prevent blisters. Popular blister-preventing lubricants include petroleum jelly and stick-formatted products such as Body Glide. Apply them to your feet before running (or whatever your activity may be) to help prevent blisters from forming, and note the same lubricant can be used to temporarily ease the pain of a blister before you're able to treat it.