Shell design features and ergonomic benefits for all Metaphor models:
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a smooth rolled crest at the top of the backrest minimizes “edge” pressure on the user’s upper back – even for taller people in relaxed postures – providing better comfort, circulation and freedom of movement;
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a gentle lumbar swell that promotes lordosis (proper spinal curvature) and comfortably supports an upright posture;
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a deeply relieved seat that helps reduce pressure on sensitive ischial tuberosities (“bottom bones”);
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a hollowed-out “wallet area” where the seat and back meet to prevent uncomfortable pressure on the sacrum and coccyx (“tailbones”)
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a blending of deeply sculpted contours toward the centerline of the seat; allowing users to settle into the shell for excellent comfort and posture;
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a gradually relieved thigh area (in conjunction with the edge design noted by Glass above), that gently supports upper legs without restricting movement or circulation; and
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a comfortable waterfall front edge that promotes good circulation through the popliteal arches (behind knees) to the lower legs and feet
Other great Metaphor features and benefits (all models):
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uniquely textured polypropylene shell for slip-resistance and durability;
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heavy-gauge tubular steel frames with a locking bracket for extra durability;
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heavy-gauge tubular steel backrest and locking front “U” for 360 shell support;
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concealed six-rivet attachment of shell to frame for long-lasting performance;
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two molded-in pockets enhance the security of the shell to frame attachment;
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handy, stylish wrap-around handhold incorporated into every chair shell.
Unmatched stacking features for Metaphor 4-leg chairs:
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4-leg Metaphor chairs can be stacked 12-high in a truly vertical stack;
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Truly vertical stack; stack does not tip or lean in any direction when stacked up to recommended height;
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“six-point stack” with no metal-to-metal contact helps avoid scratched frames;