Cressi Calibro Mask fins The integral rail is part

The integral rail is part of the barrel

They have an ankle seal and are perfect for filling out a fin if you are a 1/2 size off

This design offers unparalleled buoyancy whilst diving

ideal for making your own leaders

Cressi Calibro Mask fins The integral rail is partThe Cressi Calibro Mask is a low volume freediving mask & snorkel set that features a Fog Stop system, which greatly reduces fogging of the mask. The internal channels guide any moisture down away from the lens and onto the face. Allowing the skin to absorb the moisture. A matte, soft silicone skirt that reduces reflections and pulls away from the frame, allowing it to fit a variety of face shapes and sizes. It also features Cressi's latest Integrated