Alpha® SmartTemp Silicone Fabricless Symmetrical Liner

SmartTemp Silicone combines medical-grade silicone with the heat management technology of Outlast®. Utilising this phase change material (PCM) – originally designed for NASA – the liner regulates heat by responding to skin temperature fluctuations, delaying the onset of sweat. The liner releases the stored heat as the body cools down, stabilising the skin temperature. Maintaining this temperature balance can lead to a drier, cooler and thus more comfortable socket all day.

Features and benefits

  • Outlast technology regulates socket heat and stabilises skin temperature
  • Reduced sweating
    • Can help reduce tissue breakdown
    • Can improve suspension
  • Low flow prevents silicone migrating away from sensitive areas
  • High rebound maintains original gel shape
  • Suitable for medium to high activity levels
Interface Material: Smarttemp Silicone
  • An image of the Alpha Duo Liner in grey colour
  • Smarttemp Silicone Fabricless symmetrical
Product price
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Product Part Number: T990 Category:


Symmetrical Profile

The symmetrical profile has increased thickness distally to provide increased comfort and protection. This tapers to 4.5mm proximally for easy donning, and a thinner edge when cutting. Being uniform circumferentially means that it can be rotated by the user to increase its lifespan.

  • 9mm distal end
  • Thins to 4.5mm proximally
  • Uniform circumferentially


Alpha fabric-less liners were developed for use with the One system. However, they can also be combined with the One seal and One sock for a seal-in solution.

Additional information

Interface Material

Smarttemp Silicone

Amputation Level


Outer Fabric


Suspension Type



Symmetrical 4.5


Temperature regulation


Extra Large, Large, Large Plus, Medium, Medium Plus


Alpha Liner Manual

Alpha Liner Manual Alpha Liner Size Guide

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