Thermoformable shape-memory device and uses thereof

A device comprising:

• a first layer of a thermoformable material that is inelastically deformable in a thermoforming temperature range;
• a second layer of a viscoelastic material that is elastically deformable in a temperature range including a use temperature range of the device and the thermoforming temperature range;
• and
• wherein:
• the use temperature range is lower than the thermoforming temperature range,
• the first layer is bonded to the second layer by a chemical bond or mechanical bonds distributed over a contact surface between the first layer and the second layer,
• the thermoformable material is elastically deformable and more rigid than the viscoelastic material in the use temperature range,
• the thermoformable material is less rigid than the viscoelastic material in the thermoforming temperature range,
• the first layer defines a form of use of the device in the use temperature range, and
• the second layer defines an original shape of the device and achieves a shape-memory function of the device in the thermoforming temperature range.