Columbia Bugaboo Parka 4-7 Boys 6/7 Water Resistance: Waterproof--Treated fabrics and specially designed zippers, closures, and seams completely seal out water and rain. Outer Material: Omni-Tech--Waterproof and breathable fabric construction that prevents rain, snow and moisture from reaching the interior of the garment. Lining: Nylon taffeta--A soft and breathable fabric that is comfortable against the skin. Breathable--Allows moisture inside the garment to escape and evaporate. Promotes air flow. Zip-out Jacket: Zip-out Liner--The detachable liner zips into the shell for added warmth.