SIZE M The Women's ThermoBall™ Eco Vest 2.0 features an innovative quilting pattern slim fit and updated insulation for lightweight warmth durability and packability. It's also made with 100% recycled fabrics and fill because gear should be tougher on the cold—and easier on the planet. The use of recycled materials in our manufacturing process creates slight variations in fabric color and texture meaning that every garment is not just more sustainable but completely unique.