The Rosson Proof packs down compactly when needed and is lightweight and barely noticeable when worn. Its a great choice for lightweight hiking, outdoor rain protection, walking, and even commuting by bike. This jacket features a 2.5-layer construction. This means that instead of a separate lining, an ultra-light protective print is applied directly to the inner surface of the waterproof membrane (see first extra image). Its best to wear a long-sleeve shirt underneath, though when a sudden summer rain shower hits, you can also don it straight over a T-shirt. This jacket is not recommended for carrying a heavy backpack. - Regular fit - Waterproof, breathable, and windproof - Adjustable fixed hood - Adjustable hem and cuffs - Two hand pockets - Water-resistant zippers This product does not contain PFC compounds. The outer fabric is bluesign-certified.