Women's Smartwool Merino 150 Base LongSleeve SW015255-092 size:M The built-in whistle is designed

The built-in whistle is designed to easily alert other runners if you are in distress or to scare off critters in the night

ON Running

the 500v5 provides superior traction

For serious runners that put training and racing in the same order of importance as work and family

- Memory foam padding and patented wing design for superior comfort

Women's Smartwool Merino 150 Base LongSleeve SW015255-092 size:M The built-in whistle is designedAn all season favorite, the Merino 150 Long Sleeve can be sported as a base layer in the fall or summer when it's time to go backpacking. This base layer features Core Spun technology"which features Merino wrapped around a nylon core for added durability while still keeping the comfort of ultra soft, responsibly sourced Merino next to skin.