Mares Vector Dive Knife

At a glance

Mares Vector Dive Knife is a dive knife from Mares, rated 4.3 out of 5 and placed 8 of 13 in our lights & cutting shortlist. Its defining number is weight: 210 g. It scores hardest on build quality (85/100) and softest on packed weight (56/100). The clearest advantage divers report: sharp, durable stainless steel blade.

What the dive knife actually gives you

Where it wins and where it costs you

Full review: Mares Vector Dive Knife

The Mares Vector dive knife is a purpose-built cutting tool designed for divers who need dependable performance in demanding underwater conditions. Constructed with a corrosion-resistant stainless steel blade, this knife stands up to prolonged exposure to saltwater and the general wear that comes with regular scuba use. The blade geometry typically combines a sharp point for precision work with both a straight cutting edge and a serrated section, allowing divers to handle everything from fine line-cutting tasks to sawing through thicker rope or entangled netting. This versatility makes the Mares Vector a practical choice for recreational divers, technical divers, and underwater professionals alike who require a single tool capable of addressing multiple cutting scenarios encountered beneath the surface.

Ergonomics play a central role in the design of the Mares Vector, as the handle is shaped to provide a secure grip even when wearing thick gloves or when hands are cold and less dexterous. The textured, rubberized grip surface helps prevent slippage during use, which is critical when a diver needs to act quickly to free themselves or a buddy from fishing line, kelp, or other underwater hazards. The knife's balance and weight are calibrated to feel natural in hand, reducing fatigue during extended dives and ensuring that the tool remains an asset rather than a burden when clipped to a BCD or strapped to a leg.

Accompanying the blade is a rugged sheath system engineered for secure attachment and quick-release access, a feature that Mares has refined to ensure the knife stays firmly in place during a dive yet can be drawn rapidly in an emergency. The sheath typically includes mounting options compatible with straps for the leg, arm, or BCD, giving divers flexibility in how they carry the tool based on their gear configuration and diving style. Overall, the Mares Vector reflects the brand's broader commitment to producing reliable, no-nonsense dive accessories, delivering a knife that emphasizes safety, durability, and ease of use for divers who value having a trustworthy blade within reach on every underwater excursion.