They come in three different formulas, and the packet is color coded to indicate which type it is.
Package color: Green, this is your basic alcohol wipe.
Package Blue, this wipe is treated with a different chemical solution to kill a wider range than the GP ones will.
Packet color: Red Warning these wipes are not meant for use on skin.
Only one side of these wipes is treated, and the other is a moisture proof material. The solution on these is designed to dissolve any organic matter it comes in contact with. These wipes are intended to sterilize medical equipment in the field. Contact with skin will cause a chemical burn. One or more of these are included in any EM-G16 Series Medical Kits.