Strathmore Windpower Sketch Pads 60lb - This line of artist papers has been made with 100% windpower - a pollution free, renewable energy resource. Strathmore is the first (and only) manufacturer in the United States to make paper entirely from wind generated electricity. Strathmore pioneered the practice of using recycled content to make high quality, acid free, fine art pads. Creating paper by using windpower in no way compromises the quality of the paper. You can expect the same high standards from Strathmore that you have come to expect over the last 100 years. This medium weight sketch paper is perfect for finished works of art, quick renderings, and practice. The bright white paper is ideal for working with any dry media. Micro-perforated pages make the sheets easy to remove. 60lb (130gsm), acid free, cold pressed. 30% post-consumer fiber. 70 sheets per pad.