In the world of high-end adjustable fins for traveling divers who frequently visit exotic destinations with limited baggage allowance and demanding performance requirements, finding the ideal balance between lightness and propulsion has long seemed impossible. Mares has worked for years on the X-Stream to reconcile these two conflicting demands. We will analyze it in detail.
This detailed evaluation report is based on our documentary analysis conducted on August 6, 2026. Our ranking system maintains its neutrality, and no affiliated links are active on our website.
To analyze the performance of this high-end, adjustable model in a standardized way, we evaluate it based on five criteria with equal weighting. No field tests were conducted by us for this particular pair. This overall score of 4.65 out of 5 makes it one of the highest ratings in our comparison tool.
Type and Usage (Score: 4.5 / 5)
The Mares X-Stream is defined as the lightest and most innovative adjustable multi-purpose fin in the Mares range. It covers travel, recreational diving, and active snorkeling with a lightweight design of approximately 700g per fin.
It is designed for intermediate and advanced divers who travel frequently and refuse to compromise their performance in favor of lightness. The marine bungee strap makes it easy to put on your fins quickly.
Sails and Propulsion (P2: 4.5 / 5)
The tri-material Techralene OPB sail combines three polymers with different properties to maximize the attack angle and channel water flow through the Channel Thrust system. The flutter kick achieves an exceptional score for such a lightweight fin.
Imagine an aeronautical engineer distributing three different alloys across the wings of an airplane, each area optimized for either rigidity or lightness depending on local constraints. OPB fins apply the same reasoning to the blade design. The frog kick, helicopter turn, and modified frog kick all work well, which is remarkable for a travel fin.
The perforated anti-suction boot with a marine bungee strap receives the highest rating from the comparison website for this criterion. All indicators of comfort, including the boot itself, resistance to fatigue and pressure, achieve a score of 5 out of 5.
The Techralene OPB three-layer material receives the highest rating from the comparator for this criterion, recognizing its lightweight nature, durability, and the quality of engineering of Mares' proprietary material. Its neutral buoyancy is perfectly suited for travel and recreational use.
The three-material blade is very resistant to regular recreational use and repeated diving trips. However, some care is required when coming into contact with highly abrasive surfaces or the rusted hulls of wrecks.
The Mares X-Stream stands out as one of the most well-designed adjustable fins in our comparison, receiving top marks in its category for comfort and materials. Its exceptional lightness and propulsion performance make it an essential choice for traveling divers.
Data collected on August 6, 2026. This evaluation sheet was written based on technical data and user feedback, without individual field testing conducted by us.
