For people that aren't expert swimmers, wetsuits add buoyancy. Just as importantly, it adds buoyancy to your legs and hips which help to prevent your lower bod

For people that aren't expert swimmers, wetsuits add buoyancy. Just as importantly, it adds buoyancy to your legs and hips which help to prevent your lower body from dragging in the water. If you're a good swimmer with great technique, you're already doing this but it definitely helps people without good form and technique.