Mid Fin Co. Sunday Picnic - Tracer Single Fin Laid back but never quiet. A fin that feels like summer afternoons and unplanned sessions: simple, familiar, and just the right amount of loud. *NEW SHAPE* TRACER : Bold outline, locked-in hold. The Tracer is our hatchet-inspired fin built for surfers who want extra stability when they’re perched on the nose. Similar in spirit to the El Pivot but tuned with its own edge, this fin draws clean lines, slows things down, and keeps you steady deep in the pocket.