Custom Freediver Dive Knife Sheath designed with the help of Shri Daye. This Dive Knife Sheath is 9.75" long with the knife pocket 8.5" long which enables the entire knife (handle and all) to slide easily into. Constructed with an 18 ounce heavy duty trucking vinyl that has 40 gauge isinglass sewn between the layers for added protection. Sewn with a PTF thread. Heavy duty 2" elastic allows the diver to easlity slip their leg into it.