When the day calls for a lightweight layer, the Womens Lightweight Crew Top from Smartwool is the one you want. Wear it alone or layer it depending on the conditions and the adventures you'll get into.
Jersey and Rib knit; UPF 35
Sculpted side panels eliminate true side seams for reduced chafing and body enhancing fit
Contoured sleeve cuff and drop tail bottom hem for increased coverage
Interior flatlock seams with contrast color stitching