I Have Been Out In A Rain And Wind Storm,in My Clark The Wind Hit The Side All Night,rocked Me To Sleep.if I Had A Underquilt And A Small Tarp .i Would Have Been In Big Trouble.im A Ultra Light Backpacker Had My Pack Down To 5 Lbs Adding The Clark Back In Is Heavy But Is Built For Storms And Comfort.3 More Poundsof Security:d