Ivor Tingting wrote:Std width single mattress is generally 51cm. This is to accommodate two side by side in a 2 person tent. If wider you generally won't get them in side by side.
For Some Values Of "2 person tent". This does seem to vary from about a meter to about 140 cm.
Ivor Tingting wrote:If you blow into a self inflating mattress you introduce your damp breath into the mat which can cause mould or fungus to develop over time. It might contribute to delimitation.
A very small amount of damp on a synthetic foam out of the light shouldn't create any problems. If it did my oldest T-Rest (of 1991 vintage), which I always top up as I like a firm mat and by blowing straight in as I don't have a pump, would be mushroom city by now, but there's no indication that anything likes to live in there. No sign of it delaminating either. I've been hearing about the perils of blowing damp air on and off for years but I've never actually come across anyone who has seen it generate problems, so I've come to the conclusion it's just one of those worries that gets passed on without having any real basis.
Ivor Tingting wrote:Also it is not very nice if different people inflate the mat. I always use a pump.
Another thing I've never come across, until today, is anyone who had a problem occasionally sharing a valve on a mat. In terms of hygiene issues I'd say we're a long way off the perils of, say. sharing food or drink. Since when I got my first T-rest they didn't do pumps I didn't get one, and now they do do pumps I figure that after 27 years without I can manage without something extra to buy and carry,
I'd want to use a pump with a down filled mat, but for a self inflater I really don't see any point.
Ivor Tingting wrote:As has been said up thread the main cause of delimitation is leaving a mattress inflated in a hot tent or vehicle and the air inside then expands, the glue/welds can soften and then it starts to delaminate. Thermarest has each mat inflated for 36 hours before it packages them for dispatch. Well that's what the Cascade rep told me. They charge £15 if a leak is found to be a puncture. On the whole they are very good with warranty issues.
I've never had a warranty issue with either of my T-a-R self inflaters or a NeoAir, but I've been impressed with fault resolution from sister company Platypus when water bladders started delaminating. Replaced free of charge with no fuss.
Storing self inflaters, whether long term or between uses in the field, undo the valve but don't compress them. That way the foam is used to being "up" so will spring back to life better than if it's usually compressed.
Often seen riding a bike around Dundee...