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2. Memory foam - Wikipedia

   en.wikipedia.org/wiki/Memory_foam

   Gel visco or gel memory foam consists of gel particles fused with visco foam to reduce trapped body heat, speed up spring back time and help the mattress feel softer. This technology was originally developed and patented by Peterson Chemical Technology, [ 8 ] and gel mattresses became popular with the release of Serta's iComfort line and ...

3. Wheelchair cushion - Wikipedia

   en.wikipedia.org/wiki/Wheelchair_cushion

   Wheelchair cushions are cushions specifically designed to provide comfort and protection against injury for wheelchair users. They also aid in properly positioning the user in the correct posture. Wheelchair users are at great risk for pressure sores. [1] A number of factors are included in the formation of these ulcers including:

4. Silicone gel sheeting - Wikipedia

   en.wikipedia.org/wiki/Silicone_gel_sheeting

   The exact mechanism of action of silicone gel sheeting has not been fully studied. Currently, many proposed mechanisms explain the efficacy of such treatment, including the occlusion and hydration effect, increased body surface temperature, polarized electric charge, immunological effects, etc. [9] The occlusion and hydration effect is the most studied mechanism of action.

5. Cushion - Wikipedia

   en.wikipedia.org/wiki/Cushion

   A cushion is a soft bag of some ornamental material, usually stuffed with wool, hair, feathers, polyester staple fiber, non-woven material, cotton, or even paper torn into fragments. It may be used for sitting or kneeling upon, or to soften the hardness or angularity of a chair or couch. [ 1 ]

6. Silica gel - Wikipedia

   en.wikipedia.org/wiki/Silica_gel

   Colloidal silica gel with light opalescence. Silica gel is an amorphous and porous form of silicon dioxide (silica), consisting of an irregular tridimensional framework of alternating silicon and oxygen atoms with nanometer-scale voids and pores. The voids may contain water or some other liquids, or may be filled by gas or vacuum.

7. Sleeping pad - Wikipedia

   en.wikipedia.org/wiki/Sleeping_pad

   A sleeping pads's warmth is characterized by R-value. But unlike sleeping bags' EN 13537 test standard and widely accepted recommendations, sleeping pad R-values lacks a simple mapping and label for 'how much warmth' a consumer should expect. Combining various standards and various authors' research, an approximate R-value to temperature chart ...