Durable, flexible outer composite used to seal a glued & blindstitched seam to maximize durability and keep more water out.
Glued & Blindstitched Seams
A fully sealed, maximum stretch seam construction. Neoprene panels are glued and pressed together, then blindstitched (needle doesn't fully penetrate neoprene, keeping more water out).
Pressure Bonded Back Ankle Pull Loop
The most durable construction for keeping the pull loop attached to the boot. Pressure bonding also means a more watertight construction, since it requires no stitching that would otherwise penetrate the neoprene and let water in.