Strap fins, sometimes known as jetfins are typically worn with hard soled boots. 

There are some travel models which can also be worn without any boots 

Strap fins are the best option for shore diving, or diving in colder water where you need to wear boots. 

If you will be using Strap fins with drysuit boots you will need to be generous with your sizing as these boots tend to need a wider fitting of fins.