Smartwool Active Ultralite Long Sleeve Tee

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UOG TOP PICK – For Lightweight Performance on Hot, Long Days: With a breathable Merino-TENCEL blend, fast drying time, and reliable odour resistance, the Smartwool Active Ultralite Long Sleeve Tee is a minimalist layer built for multi-day hikes and warm-weather climbs.

Smartwool says: 

The athletic fit of our Men’s Active Ultralite Long Sleeve complements the movements of your body. With comfort features like offset shoulder and side seams to help minimize chafing, this very light and soft tee is made with a blend of ZQ-certified Merino wool and TENCEL™ Lyocell fibers, a performance fabric that helps you feel cool even as your activity intensifies. Plus, it’s designed with reflective elements for low-light conditions, so this tee is great as a standalone for early-evening runs or as a baselayer for your next cool-weather adventure.

Our Verdict

The Smartwool Active Ultralite Long Sleeve Tee weighs 151g in Medium and uses a Merino-TENCEL blend that feels natural but dries quicker than standard Merino. I really value that mix, it strikes the right balance between next-to-skin comfort and moisture control during long climbs or high-output days. It’s also odour-resistant, which makes it particularly useful for extended trips.

The fit is on the relaxed side, so if you prefer something closer to the body, you might want to size down. The stitching is tidy and unobtrusive, and the fabric doesn’t rub under a pack. It’s not the toughest piece I own, but that’s an acceptable compromise given how light and breathable it is.

This is my go-to baselayer, especially for multi-day hiking. I own three.

A minimalist, airy layer that works hard in heat without getting in your way.

– Reviewed by Ultralight Outdoor Gear

Features

• Our athletic fit is intended to be body-skimming to keep the body moving freely
• Ultralite fabric combines the moisture management, temperature regulation, and odor resistance of Merino with  TENCEL™ Lyocell fiber
• Odor-resistant
• Offset shoulder and side seams help increase comfort and minimize chafing
• Reflective elements

Specifications

• Small weighs: 137g
• Medium  weighs: 151g
• Large weighs: 158g
• XLarge weighs: 173g
• Fit: Athletic

Material & Construction

• 53% Merino Wool, 47% Lyocell. Exclusive Of Decoration.

Help & advice:

• The Benefits of Merino Wool