6.5 mm neoprene.
The seams of the boots are waterproof due to GBS assembly (Glued and Blind Stitched): Neoprene is bonded and then stitched to ensure maximum resistance (the needle does not go all the way through the neoprene, preventing leaks).
Fit of the fin, sole and reinforcements
Stop system on the heel keeps the fin strap in place so that you do not lose it when diving.Neoprene boots with flexible ridged rubber sole for better grip (non-slip).The upper is reinforced to limit the discomfort of adjustable fins.
These scuba diving boots provide thermal protection that has been tested by the independent INPP institute (Marseille, France) in order to validate their compliance with the current standard (EN 14225-1:2017)