Err ... no, but if commercial companies are not interested there's lots of DIY instructions out there - this one for example: https://backpackinglight.com/forums/topic/37378/ Some heat weldable 70D nylon, a domestic iron and you could knock one up in no time ....



Running a marathon through Death Valley might be a bit more specialist than I'm used to and I'm not surprised that no-one was peeing. Most of the people I've seen heading for the bushes in events have been taken in by marketing hype and bought some wonder liquid that's promoted by a combination of benefits (optimise your performance) and fear (water's bad for you- you sweat out electrolytes so you should take in electrolytes. If you don't take this stuff someone else will and they might beat you).

Actually there is some truth in that and the more you sweat out the less effective water alone is at rehydrating. You can get to the point where you drink and drink and all it does is slosh around in your stomach and not seem to do anything. You'll have to do a lot more than the local charity 5K / 10K to get to that point though. Apart from a few elites at the front most runners don't really know what works or doesn't so they're suckers for a good marketing line. Being cheapskate as always I just dump a sachet of rehydration salts into a bottle of water. It works for me and it tastes a lot better than the coconut milk based stuff that seems to turn up at every event I've been to in the last few years. It sounds more like something out of The Simpsons than a real product - "The Awesome Power of Coconuts".


I've been in races where people have collapsed - particularly on hot days (in the UK that's anything over about 75F!) but mostly it's from getting their pacing wrong - too fast too soon. It's very easy to get caught up in the moment, particularly at the start, and you pay for it later on. And there's always a few who do no training and just try to wing it - "how hard can it be"? I saw someone collapse from that 1 mile into a 13 mile race.

ps. MEZ - sorry about hijacking your thread!