FREE SHIPPING
Free Shipping! On Orders Over $50 Details.
But fear not - there is plenty to explore...
Shop all Smartwool Shop sale SmartwoolMEMBERSHIP
Earn up to 10% back in rewards. Learn more. Join Free.
EASY RETURNS
Take up to a full year to return your item! See our Return Policy.
LOWEST PRICE GUARANTEE
Find a better price? We’ll beat it by 5%. See our Price Match Policy.
The Smartwool Lightweight Zip Top is a versatile baselayer that will help you stay warm and dry and sweet smelling all at once. Made with super soft Merino wool with a zip closure that lets you dump heat or zip up in a snap, this is winter underwear at its most effective.
100% Merino Wool – Naturally wicking Merino wool keeps you dry and fights bacterial growth.
Athletic Fit – Slim cut but not confining
Flatlock Seam Construction – Designed to eliminate chafing
10" (25cm) Center front zip with semi-locking logo slider
UPF 35+