The Mares Avanti Superchannel Open Heel is a proven workhorse fin built around the brand's Channel Thrust design. A three-rib blade lets the fin flex and arch through each kick, channelling water straight back behind you instead of spilling it off the sides.

That channelling is the whole point. By directing more of the displaced water in the opposite direction to your motion, the fin converts more of your leg power into forward thrust, so you cover ground with less wasted effort. Blade length scales with size, sitting in the region of 35 to 37 cm.

With its open anatomical foot pocket and standard elastic strap, the Superchannel is a dependable, durable all-rounder. It is a sensible pick for Indian recreational divers who want solid performance from a fin that has stood the test of time.