Headgear- covers ears for protection from cauliflower ear. Best design is the Tornado design as seen on the hyperlink that brought you here.
singlet- Clings to your body so the opponent doesn't have an unfair advantage by grabbing something. Best place to buy these is asics.com
wrestling shoes/boots- feel like an extra layer of skin. can bend like your feet can and gives you grip on the mat. best place to buy these is from ASICS.
warm-ups- jacket and pants that you warm up in and use to represent your team. no specific company known to buy them from.