This topstrap is developed by Pimax and works with an adjustable knob and strap that goes on the top of your head. You can secure the strap with screws next
Testing another headstrap option for the Crystal in our workshop
Store Pimax
Shop Pimax
Pimax
Crystal Comfort Topstrap
Pimax
Crystal comfort topstrap review. Spoiler: It's good. : r/Pimax
Comfort Topstrap Pimax Crystal - EU - For Sale - ED Forums
Store Pimax