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A mattress protector (also mattress cover, mattress pad may mean this or a mattress topper [1]) is an item of removable bedding that sits on top of, or encases, a mattress to protect it. Some mattress protectors also provide protection to the person sleeping on the mattress from allergens and irritants such as dust mites , bed bugs , mold , and ...
An air mattress as might be used for temporary guest accommodation. An air mattress is an inflatable mattress or sleeping pad.. Due to its buoyancy, it is also often used as a water toy or flotation device, and in some countries, including the UK and South Africa, is called a lilo ("Li-lo" being a specific trademark — derived from the phrase "lie low") or a Readybed.
The term "waterproof" refers to conformance to a governing specification [1] and specific conditions of a laboratory test method. They are usually natural or synthetic fabrics that are laminated or coated with a waterproofing material such as wax , rubber , polyvinyl chloride (PVC), polyurethane (PU), silicone elastomer , or fluoropolymers .
When the spinal nerve leaves the vertebral canal via an intervertebral foramen, two layers of the spinal meninges, the arachnoid and the dura invaginate the nerve to form a dural sleeve of connective tissue, which is the epineurium. The outer portion of this sleeve comprises the external epineurium which permits longitudinal nerve excursion and ...
The dura mater covering the spinal cord is known as the dural sac or thecal sac, and only has one layer (the meningeal layer) unlike cranial dura mater. The potential space between these two layers is known as the epidural space , [ 5 ] which can accumulate blood in the case of traumatic laceration to the meningeal arteries .
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