ScubaLab tested eight new frameless single-lens masks in a head-to-head evaluation. The Fourth Element Scout is our Testers Choice for 2025. We evaluated masks for the ease and security of making strap adjustments and their overall comfort in the water. We also rated masks for their field of view, how effectively their seal kept our faces dry, and how easy they were to clear and equalize.

The Scout's frameless construction offers a low internal volume, solid comfort and an unobstructed view. It is available with four different lens treatments, each of which is designed to optimize vision for different underwater scenarios, such as diving in dark shipwrecks or swimming over shallow, sunlit reefs. Our test sample was outfitted with an optional elastic strap made of 100 percent recycled materials.

Divers love the convenience and comfort it provided. The mask has a thin skirt edge and is very comfy, but stiff enough that it doesn't always follow the contours of the face closely enough for a fully watertight seal. The result is some minor leaking over time, and that clearing water from the mask can sometimes take a little more effort than expected.

That didn't stop the mask from being picked overwhelmingly as a favorite of test divers. The Fourth Element Scout is ScubaLab's testers choice for frameless masks.

Read the full ScubaLab review of single-lens mask here.