Size: 36" Width X 144' LengthWeight: 15 lbs.Material: Organic Mat, Saturated With AsphaltUse To Provide An Extra Layer Of Protection Between Shingles And Roof DeckAsphalt Saturation To Help Improve Waterproofing Ability To Prevent Wind-Driven Rain And Water From Other Sources From Infiltrating Under Your Shingles And Causing Damage To Your Roof Structure Or Inside Of Your HomeSlip-Resistance For Safety In Warm Climates***AVAILABLE FOR LOCAL PICKUP ONLY***