In technical diving, where maintaining a perfectly horizontal trim is crucial for safety and hydrodynamic efficiency, the weight distribution of the fins is a key factor in balance. The Italian manufacturer Mares offers the XR Power Plana LT, an adjustable, single-piece fin made from lightweight natural rubber, designed for advanced technical diving. We analyze its performance underwater.
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 effectiveness of this lightweight rubber technical model in a standardized way, we examine five evaluation criteria with equal weighting. No field tests were conducted by us for this pair. This overall score of 4.45 out of 5 represents its theoretical design quality but does not guarantee individual comfort.
Type and Usage (Score: 4.5 / 5)
The Mares XR Power Plana LT is a technical diving fin designed for deep exploration, heavy setups, and cold water immersion. Its very wide open heel is designed to accommodate thick booties.
Its advanced level is designed for regular divers who are looking for rigid support under the foot. Weighing approximately 1000g per fin, it positions itself as a stable technical model that facilitates horizontal balance.
Sails and Propulsion (P2: 4.5 / 5)
The very wide, single-piece fin offers an excellent surface area that channels the water without any deformation of the blade. This profile allows for an excellent "flutter kick" style propulsion with outstanding efficiency.
Imagine a backcountry skier tackling a steep, icy powder slope with monocoque skis whose core has been lightened with carbon stringers. These wide planks offer excellent torsional stiffness while reducing weight at the feet during ascents. This is the principle behind this lightweight "LT" version, which maintains its rigidity for support without straining the ankle. The frog kick and back kick techniques are very effective.
Muscle fatigue remains well-controlled thanks to the reduced weight of the LT rubber compound. On the other hand, thermal comfort in cold water is excellent, earning it the maximum score for our protection criterion.
The one-piece construction made of natural, vulcanized rubber ensures excellent structural resistance to twisting. The blade has a moderate negative buoyancy in seawater, which helps with balance.
The Mares XR Power Plana LT stands out as an excellent, lightweight technical adjustable fin designed for experienced divers. Its robust rubber construction and practical spring straps justify its very good overall rating.
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.
