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Reader Submitted: Sink-In: An Ultra-Customizable Chair
‘Sink-In’ is an adjustable piece of seating furniture that allows a variety of sitting positions to fit the user’s comfort in height and size.
The 'Sink-In’ chair is built from two wooden frames filled with sponge units that can be moved back and forth, thereby creating various of different chair models in various sizes and heights.
http://www.core77.com/projects/48545/Sink-In-An-Ultra-Customizable-Chair