Seamless construction offers extra weather protection. Mid-back keeper strap that holds it secured to the pack. Comes with integrated stuff sack for stashing it away once the storm passes. Made of 30D Diamond Ripstop silicone impregnated Cordura, waterproof finish won't peel Siliconized Cordura is about one third the weight of traditional coated nylon No seam construction for complete waterproofness Assorted colors Mini siliconized nylon stuff sack remains attached to the cover