shapes for back sleepers to ensure stability. Independent lab testing on some low-friction textiles (e.g., ASTM D1894) reports very low coefficients of friction, supporting reduced shear potential, though direct clinical evidence for wrinkle prevention remains limited and observational.

Water-immersion wrinkling

The wrinkles that occur in skin over prolonged exposure to water are sometimes referred to as pruney fingers or water aging. This is a temporary skin condition where the skin on

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