Difference between Thermal protective aid and immersion suit .

What is Thermal protective Aid ?
What is immersion suit ?
Colour of TPA and immersion soon suit ?
Can we swim wearing thermal suit ?
Purpose of immersion suit?

[@avinashreddy9587]

I think TPA are worn over a life jacket

[@NavigatewithAnkit]

Yes

[@sajinsraj49]

If we can't use it in water why requirements says can be removed in water with in 2 minutes ?