Can’t go wrong with the good old fashioned condom. In a longterm relationship there’s not that much spontaneity to ruin anyway!
I’ve got vulval skin condition so was concerned condoms might affect that but with a good water based lube I never noticed a difference to my symptoms.
We used Skyn latex free regular size which fitted well, felt good and never had an accident with them, they always stayed on. Husband said the feeling was still good and only a very minimal difference. Still feels good for me too and does actually make the sex part last a bit longer!