A canoeing trip to Big B*** National Park in West Texas inspired the Nike apparel ACG Lava Flow pants, named after the dramatic rock formations created by slow-moving lava that the team witnessed there. Engineered to tackle the chill of those long desert nights, they’re packed with tech to keep you warm: from Therma-FIT ADV technology to Prima Loft® insulation. 100% Nylon Prima Loft® Insulation Nike Therma-FIT ADV Tech Packable into Pocket Elastic Waistband Internal Waist Drawcord Zip Hand Pockets ACG Carabiner Ankle Bungee Adjusters Style Code: HV4461-010