The Eureka! SINGLIS ST, UL (ultralight), Lite, in the regular and large sizes are all basically the same sleeping pad with color variations, and differences in width. What they all share is the same brass valve twist closure, the same plastic nylon or plastic-like epoxy resin valve seat block (that goes in the corner, and is glued to the air pad canvas. The brass valves are press fit into this plastic-like block. The pads I have of this ilk have suffered two maladies, either alone making the air pad useless, and both together in one pad calling to question (or really making an undeniable statement on) the quality control at Eureka!. Or rather the total absence of any quality control. The brass valves can be double threaded, right out of the factory. This is very frustrating in the field, as you thread the cap onto the valve neck, twist a full revolution or more, get it tight, and find that the valve is not closed, and that it will still pass air in (if you blow), or out (as the air pad deflates). In 20 close attempts, 1 in 20 will work (grab the good thread, not the bad cross thread) and 19 of 20 will grab the wrong thread, no matter how slow and careful you go. Completely unacceptable quality, or really a statement on complete lack of quality. The other problem I have personally experienced with a brand new out of the box sleeping pad in this Brand family is that the valve seat (a plastic block) was not glued properly to the pad canvas. So little glue was pres...
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