Wheelchair Alignment Gauge

I have been using various Supracor Cushions for many long years, well over a decade, they are the Very BEST COMFORT for paraplegics who can at least either lean side to side or slide a bit forward in their wheelchairs. HONEYCOMB, soft innumerable honeycombs are their SECRET IN GOOD, Comfy Seating. You can wash to cover and put the inside honeycomb cushion in the shower, use mild soapy "Dawn" or similar mild soap to spray into honeycomb top to remove dirt, stains, body oils easily and even though honeycomb's may've appeared crushed initially, when you spray off all soap residue, the honeycombs pop up like a flower opening to it's full, original appearance! So showering the cushion inside the cover (as cover is being washed & dried on easy, light tumble cycle and dryer) on a monthly or bi-monthly basis is recommended. I have to admit though, I've let some go as long as a year w/o doing this and when I get someone to do it for me, it becomes like NEW again. I cannot give Supracor anyt...