The workhorse cold-water sock. 5.5mm of insulation against the conditions where warmth matters most — long winter sessions, deep drifts, post-dive surface times where everything else has gone cold. The high-top cuff seals up against your wetsuit leg to shut out flush water, and the reinforced sole takes the punishment of boat decks, reef entries, and rocky shorelines without complaint.

Same Essentials promise as the rest of the line: no marketing surcharge, no premium that doesn't earn its keep. The sock you grab without thinking about — and don't have to replace by season's end.