Smoke-free home. From Outdoor Research: The Echo T-Shirt features bluesign®-approved recycled stretch materials and UPF 15 sun protection to create our customer-favorite ultralight, anti-odor, 4-season specialist base layer for active outdoor pursuits on trail or in town. The Echo T-Shirt is built from bluesign®-approved and recycled materials and is perfect for everything from fall running and spring ski touring to summer hiking and winter base layers. The lightweight and breathable fabric is infused with UPF 15 sun protection and ActiveFresh™ odor control technology, and the AirVent™ technology provides superb airflow and moisture management. The Echo T-Shirt features a reflective logo, quick-drying fabric, and flat-seam construction for a comfortable fit. Truly an all-arounder and an OR customer favorite, the Echo T-Shirt is the do-it-all piece for 4-season use Product: #287628 Fabric: bluesign® approved 100% Recycled Polyester Center Back Length: 71.1 cm / 28 in Weight: 2.8 oz/ 79 g Origin: Bangladesh