Thicker, warmer, and even more stunningly luxurious than the Eolus, the Shava Tube is 35% heavier and just as soft and breathable.The body’s natural warmth is contained in thermal air pockets constructed from precision knit, napped, and sheared polyester. High Loft™ consists of hydrophobic yarns that repel moisture and speed dry times. This symmetrical design is not only soft, but also reduces surface friction for versatile layering options. Warmth Regulating – Breathable – Lightweight – Packable – Made from Recycled Plastic Bottles Designed for the fashion-focused customer in mind, we utilized High Loft fabric from Polartec® to deliver a luxury product with high performance features. Stunningly soft and fluffy, the structure compresses easily and provides the highest warmth to weight ratio of a thermal fleece fabric available today.