# spinless and time reversal symmetry breaking of p-wave pairing in topological superconductors

In the context of Majorana zero modes, I often hear that the p-wave pairing is effectively 'spinless' and time reversal symmetry broken.

I understand that s-wave and p-wave refer to the spin portion of the Cooper pairing.

I haven't been able to understand what makes p-wave pairing 'spinless.'

Plus, my understanding of time reversal symmetry is minimal: when a given system is time reversal symmetric, $$T H(k)T^{-1} = H(-k) .$$

How is p-wave pairing 'spinless' and how does it break time reversal symmetry?