Complex sentence: Buoyancy aids are reversible to wear and are coloured with the teams primary and secondary colours on each side, this is to allow opponents to reverse their buoyancy aids and play in their away colours if the opposing teams primary colour is the same or similar.
Split into simpler sentences: Buoyancy aids are reversible and are coloured with the teams primary and secondary colours on each side. This allows opponents to reverse their buoyancy aids and play in their away colours if the opposing teams primary colour is the same or similar.