>>2835407 (OP)
because people dont like to drink their own sweat
you would need a portable desalination machine that i guess would have have to strap to you back
and you would need to empty the salt buildup from it
and you would need to power it and desalination is notoriously power hungry meaning a huge battery pack also on your back
you would also need a way to sterilize the water and the suit while/after wearing which sounds like a nightmare
so you could MAYBE do it but be at your weight/storage capacity just for the suit
OR
you could just pack normally and wear normal hiking clothes and pack water existing water filtration supplies
retard