Challenge Outdoor News from Around the World Garage Grown Gear ‘Is Ultra the Fabric of the Future? UL Gear Makers Say They're Impressed!’Article Ripstop By the Roll ‘Everyone is Using this Stuff with Challenge Sailcloth’Audio , YouTube‘NEW FABRIC | ECOPAK | Fully recycled fabric from Challenge Sailcloth’YouTube‘Challenge Sailcloth's EPL Ultra | New Product Release Video’YouTube The Trek Co ‘EcoPak – Revolutionizing Thru-Hiking Packs for a Better Planet’Article Backpacker A New Uber-Strong Recycled Fabric Is Taking the Ultralight World by StormArticle