Running with the S21 Ultra?

I have used a Flipbelt whilst running for the past few years – it worked well with my previous Note8 and is still in good shape. However I find the openings are quite tight for an S21 Ultra with a Spigen Neo-hybrid case and the fact that sweat gets through is quite off-putting.

Have you found good solutions that you would recommend for running/doing sport with your S21 Ultra that is big enough to house this beast in its case?

Source: XDA