Smartwool Merino 250 Classic Thermal Base Layer Crew – Kids' Size:XS while the 4 Degree Elite

while the 4 Degree Elite Fit System locks the sock in place so it never bunches or slips mid-run

Developed using All Terrain Contagrip® for adhesion and confidence on the widest variety of surfaces

Standard fit layers easily under a softshell or hardshell on cold trail days

while anti-odor treatment keeps things fresh through back-to-back sessions

Smartwool Merino 250 Classic Thermal Base Layer Crew – Kids' Size:XS while the 4 Degree EliteBuilt for cold weather adventures and active kids who run hot and cold at the same time, the Merino 250 is our go to midweight base layer for young athletes. 250g merino wool regulates temperature naturally and fights odor without chemical treatments, so it stays fresh across multiple wears. It works equally well under a puffy on a winter hike or as a standalone layer on chilly morning starts. 250g merino wool weight hits the sweet spot between warmth