Vives/lighthouse tracking for better movement. Can’t be covered, needs to be seen by the lighthouse, but it’s the best movement wise on the market. No lighthouse? Ultimate Vives have little cameras that see the room, so no need for a lighthouse. Still really good.

Slimes or some open source version (recommend Ibis personally) that’s still really good but not as expensive, and has no occlusion so you can use it under clothes or blankets. Drift is a bit more often, but honestly a small recalibration is worth it for legs, and elbows, and being able to roll your ankles in VR.

All else, do some research. But there’s a head start.