I can't answer that. They are nice lightweight pants,the only drawback being that there is no accommodation for opening the ankle wider to get them over shoes or boots.I have only used them in moderate rain.Nice and dry.They pack down amazingly small and light. For serious rain,I have a cycling raincoat with pit zips by Showers Pass. The sturdiness of these pants is nothing like my Showers Pass jacket.But I wouldn't take a Showers Pass jacket backpacking-too bulky.
Answered on 3/4/2016 8:30:18 PM by Poodlegal from Cali
There is not a waterproof rating listed on this item.
Answered on 3/7/2016 3:26:25 PM by Product Specialist Greg from Sierra Trading Post