i just wear ordinary work trousers with the inserted pads (think chocolate bar name!) then over the top wear a size bigger pair of waterproof trousers, i have tried many pads and the screed just gets behind the pads throughout the day and the straps cut into my legs, making it very uncomfortable, i found with waterproofs on i can walk on my knees saving me having to get up and down a lot,
give it a try mate.