Smartwool Men's Classic All-Season Merino Base Layer Bottom (Iron Heather)

Wherever you're going and whatever you're doing, these lightest-weight base layer bottoms are the perfect base layer for adventures during all seasons. They have an updated fit that improves functionality while enhancing aesthetics for a wide range of body shapes.

It is made of Smartwool’s lightest-weight Merino jersey fabric – super-soft, responsibly sourced Merino wrapped around a Nylon core to give it added durability - so it can keep up with you. It keeps the no-itching, soft, thermoregulating, odour-resisting Merino where it matters – next to the skin.

Please take a moment to watch this Smartwool Merino 150 video

This base layer is designed to keep you comfortable if you love getting outside and is made to handle a variety of seasons and uses. Designed to elevate comfort, range of motion, and fit, so you'll feel ready to take on anything at any time.

• Lightweight Merino jersey fabric with a recycled nylon core to increase durability while still keeping 100% Merino wool next to skin
• Merrow stretch stitching, designed to elevate comfort, range of motion, and fit
• Merino-lined, elastic waistband designed for maximum comfort
• Slim fit; this mid-rise bottom sits at or just below Belly Button