Wings which are the small kites that you hold whilst wing surfing. They can range from 2 metres through to 7 or even 8 metres. The smaller wings are less powerful but easy to handle so are great for smaller riders or if not power if needed whilst on the hydrofoil. Larger wings produce much more power so are great for heavier riders or if your wanting to get going in lighter wind conditions. The thing to watch with the larger wings is that you have enough clearance so that the wing doesn't drag on the water.
Some Wings like the Duotone have an aluminium boom, other wings like the Ozone and the Naish have handles with which to hold it.