The leggings that they provide are also available in the 2.0 or the 4.0 both materials incorporate a grid design, which helps to trap air against the body for installation. They're constructed of the same four-way stretch, moisture-wicking and also breathable. Those working in a construction site, airport runway freight line, or on rail cars in the cold weather will all benefit from the warmth and protection of Under Armour base layer garments. The 4.0, which is a thicker version is ideal for long periods of sitting or standing in colder environments. This is good for people working in a warehouse, driving a delivery truck, or those who move inside and outside throughout the day. The 2.0, which is the lightest weight thickness. We offer these in two different thickness levels. Today, we're going to discuss t he Under Armour Packaged Base Layer in the leggings and the crew. We've teamed up with Under Armour to bring you garments that keep you productive and focused. Product Features of the Under Armour® ColdGear® Base 2.0 Leggings