The Nylon 56 Taslan ripstop face of eVent alpineST ST3003 is plant-based, and the 100% nylon tricot backer feels comfortable next to the skin. Ideal for outdoor and activewear, it is a soft but durable mid/lightweight fabric. 40 FD by 75 FD, 140 grams per square meter (4 ounces per square yard).