This is the Aqua Lung SLT Seal Lock Technology Neoprene Neck Seal

Features:

• Neck seal can be installed within minutes
• Neoprene material provides exceptional comfort
• Glide skin folds in for a watertight seal
• For use with the SLT system

For those who prefer neoprene, the Sure Lock Technology (SLT) Neoprene Neck Seal provides exceptional comfort, easy installation and a glide skin that folds in for a watertight seal. Comfort has never been so quick!