It is essential to wear TRAINERS. The best trainers for Zumba are dance aerobics trainers like NIKE AIR DIVINE or NIKE MUSIQUE or NIKE AIR KAPELLA. The sole has a light grip and a 'spin spot' which will help you twist and turn. Cross trainers or running shoes are not ideal as they are made to propel the body forwards and backwards and have a heavy grip. Jazz shoes or pumps will not cushion your body from impact.
It's up to you what WORKOUT GEAR you want to wear but ideally it should let your body breathe and move.
WATER is another essential. You need to rehydrate for lost fluids so please bring plenty of water and take frequent sips.