We're going to go out on a limb here, and say that this is a picture of a couple, and they've both decided that their best look for going to the store is camouflage. Camouflage for him, and camouflage for her. Walmart does sometimes feel like a warzone, and it's probably quite helpful if you're able to blend into a background for a while, waiting to emerge when things calm down.
Of course, if you're both wearing camouflage, there's a risk that you won't be able to see each other. That's probably why they've both gone for matching white tops to make themselves stand out - thus nullifying the effect of the camouflage. If they weren't a couple when the picture was taken, by the way, we bet they are now. If you saw someone dressed exactly like you, you'd have to talk to them. At least you know you have something in common right from the start.