The%20Echo%20T-Shirt%20features%20bluesign%C2%AE-approved%20recycled%20stretch%20materials%20and%20UPF%2015%20sun%20protection%20to%20create%20our%20customer-favorite%20ultralight%2C%20anti-odor%2C%204-season%20specialist%20base%20layer%20for%20active%20outdoor%20pursuits%20on%20trail%20or%20in%20town.The%20Echo%20T-Shirt%20is%20built%20from%20bluesign%C2%AE-approved%20and%20recycled%20materials%20and%20is%20perfect%20for%20everything%20from%20fall%20running%20and%20spring%20ski%20touring%20to%20summer%20hiking%20and%20winter%20base%20layers.%20The%20lightweight%20and%20breathable%20fabric%20is%20infused%20with%20UPF%2015%20sun%20protection%20and%20ActiveFresh%E2%84%A2%20odor%20control%20technology%2C%20and%20the%20AirVent%E2%84%A2%20technology%20provides%20superb%20airflow%20and%20moisture%20management.%20The%20Echo%20T-Shirt%20features%20a%20reflective%20logo%2C%20quick-drying%20fabric%2C%20and%20flat-seam%20construction%20for%20a%20comfortable%20fit.%20Truly%20an%20all-arounder%20and%20an%20OR%20customer%20favorite%2C%20the%20Echo%20T-Shirt%20is%20the%20do-it-all%20piece%20for%204-season%20use.