fleece pullover in oeko-texâ„¢ gsr certified recycled polyester. the eivy ball fleece pullover comes with a hip 1/4 zip and high collar for the best protection on cold days.eivy not only impress with functionality and a great design, they use environmentally friendly material to produce their stylish base layers and sweaters.this fleece pullover uses an oeko-texâ„¢ gsr certified recycled polyester.