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Old March 21st 17, 07:47 AM posted to rec.aviation.soaring
Ross[_3_]
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Default Confor foam cushions - firmness?

We use the foam in the headrest of the Formula 1 cars and also in the seat to protect the spine.
White up to 15 deg, Pink from 15-30 and blue above 30 deg. Specified by the FIA