Icebreaker Merino 150 Tech Lite SS Relaxed T-Shirt ib Heritage - Black, Size M

On a crisp morning trail run or a multi-day trek through the backcountry, the Icebreaker Merino 150 Tech Lite Short Sleeve Relaxed T-Shirt in Black keeps you comfortable when the pace picks up. This men's tee is cut from 100% merino wool at a lightweight 150 gsm, so it breathes naturally, wicks moisture, and resists odour even after long hours of wear. The relaxed fit gives your shoulders and chest room to move, while the classic crew neck and short sleeves make it an easy layer under a pack or on its own in warm weather. Part of the ib Heritage collection, it carries a subtle graphic that nods to Icebreaker's outdoor roots.

Key specifications

• Material: 100% merino wool, 150 gsm
• Fit: Relaxed
• Neckline: Crew neck
• Sleeve length: Short sleeve
• Colour: Black
• Size: M (Medium)
• Technology: Tech Lite
• Collection: ib Heritage
• Gender: Men's

Why choose it

Merino wool is nature's performance fabric. It regulates your body temperature in both cool and warm conditions, pulls sweat away from your skin, and dries quickly. Unlike synthetic tees, it stays fresh for days because merino naturally resists the bacteria that cause odour. This shirt is also ZQ-certified, meaning the wool comes from farms that meet strict standards for animal welfare, environmental care, and social responsibility. The relaxed cut is ideal for hikers, climbers, and travellers who want freedom of movement without a baggy look.

Ideal use cases

• Day hikes and multi-day backpacking trips
• Trail running and fastpacking
• Travel and everyday casual wear
• Layering under a fleece or shell in cooler weather
• Warm-weather outdoor activities where breathability matters

Good to know

Machine wash cold on a gentle cycle and line dry in the shade to keep the merino fibres in top shape. Avoid bleach and fabric softeners. The shirt packs down small, so it's easy to stash in a backpack or suitcase. With proper care, this tee will be a go-to for years of adventures.