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I have learned that the L and SL tracks are the same thing. The cheaper ones are only S (for the back alone), the better ones are L shaped (slightly under the butt and upper thigh), but the L is also called SL - I guess this means it is both S and L, so it sounds better than just saying L...
Sorry, there was a problem. Please try again later.Hi Lynn, This massage chair uses a SL Track. Insignia Support Alvin www.insigniaproducts.com
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