Ripstop fabric does live up to its name - Horse rugs are often made of this and some are very good at ripping their rugs. It does tear, but not far and is easily repairable, and does not fray either.
I cracked up when I saw the rain hats - i remember they used to come in little pouches, and had to be super dry before you packed them up again, otherwise they stuck to themselves. I remember having a fairly substantial one that used to be supplied with the school regulation 'Robert Hirst' raincoats!