I'll 4th that vote too, yes afraid rukka guarantee run out now, but if you nikwax TXDIRECT on any gore-tex gear every 6 months or so BEFORE it starts to leak, it prevents it in the first place.. apparently...
remember.. if you do wash stuff in machine, don't use wash stuff, use nothing or nikwax wash stuff or it blocks up membrane and wont be waterproof anymore anyway.... always coat it after washing with TXDIRECT aswell...
