The TKA 100 Classic Trinity Alps is a soft, half-zip fleece made of bluesign approved materials. bluesign sets an environmentally-friendly standard for materials and production. This fleece pull-over is made of ultra soft Polartec® 100 classic micro fleece that dries quickly to minimize heat loss. Whether you're in the backcountry or the office, this jacket provides 18 percent more warmth and 40 percent more thermal efficiency than the original TKA 100, and with less weight. Other notable features include: a pill-resistant face and back, TNF™ Apex chest pocket with infused reverse-coil zip and UPF 30 sun protection.