I had some time to check out POE mats. The Ether Thermo 6 seems to be as close to the old Insul Mat Max that I can come up with at only 16 oz for the 3/4. I'm in the same boat as others, I have a Thermarest LE 3/4 and my shoulders and sometimes my hips start hurting part way thru the night. Depends on whether I was picking peas before my trip or squatted too much before a trip working in the garden and sometimes over the bp stove during a trip. At 22 oz. for more comfort and less weight I may pick up the thicker one, after my 21 oz Slinglight chair is paid off.:) Trying to offset the weight of the chair now and the 2.5 inch thick one would cut 10 oz. from the weight of the Thermarest and if I bring my Esbit stove and fuel for a week long trip I could cut another 4 oz, l would then be at 7 oz heavier than last year for a week long trip. Thank you.