Ibex Woolies Pro Tech 3/4 Length Bottom Review

Ibex Woolies Pro Tech 3/4 Length Bottom Review by Erin Trail The Ibex Woolies Pro Tech 3/4 Length Bottoms are a super lightweight base layer option that utilizes Nuyarn® to make the Merino Wool stretchy and warm. Details 85% Merino Wool, 15% Nylon Weight: 125 gsm Micron gauge: 19.5μm Crafted using Nuyarn® technology Review I…

Erin Trail

February 23, 2026

4–6 minutes

base layer, ibex, merino, winter

Ibex Woolies Pro Tech 3/4 Length Bottom

Review by Erin Trail

The Ibex Woolies Pro Tech 3/4 Length Bottoms are a super lightweight base layer option that utilizes Nuyarn® to make the Merino Wool stretchy and warm.

Details

85% Merino Wool, 15% Nylon
Weight: 125 gsm
Micron gauge: 19.5μm
Crafted using Nuyarn® technology

Review

I am a women’s size medium based on the Ibex size guide and I found the Ibex Woolies Pro Tech 3/4 Length Bottoms to fit true to size. They fit tight against my skin and don’t stretch or sag after a day’s moving around.

The waist is a yoga style waistband, which I really appreciate. There isn’t additional elastic in the waistband, just slightly reinforced material that helps to keep the bottoms in place without pinching. I also like the 3/4 length, which is the perfect length to work with ski boots, hitting just above the boot line.

The material of the Ibex Woolies Pro Tech 3/4 Length Bottoms is THIN. So thin that they are very see through and I would not feel comfortable wearing them solo around others. For my review photos, I wore dark purple tights beneath the Ibex Woolies Pro Tech 3/4 Length Bottoms, just to give readers an idea of the transparency of the fabric (and to keep the photos PG).

I’ve been wearing the Ibex Woolies Pro Tech 3/4 Length Bottoms often, either for alpine skiing or on cold winter walks. Despite their thin appearance, I haven’t noticed any signs of wear (pilling, stretching) and they’ve maintained their shape well.

The Ibex Woolies Pro Tech 3/4 Length Bottoms are also warmer than they appear to be. For alpine skiing, I’ve been wearing the Ibex Woolies Pro Tech 3/4 Length Bottoms as a base layer, beneath an insulated pant and shell bibs or pants. They offer just the right amount of warmth and moisture control, keeping my legs at the perfect temperature while both skiing and sitting on the lift.

I think the sweet spot for the Ibex Woolies Pro Tech 3/4 Length Bottoms, besides the obvious alpine ski use, is as a base layer beneath nearly any type of pant. I’ve been healing up a bum Achilles and have been doing a ton of walking in the early evenings this winter. The Ibex Woolies Pro Tech 3/4 Length Bottoms easily fit under any style of pant (jeans, cords, skinny jeans) and offer great insulation and warmth without the bulk. They fit almost like wooly tights instead of a wool base layer. These would be a great option for anyone who works in cold buildings or outside and needs something that fits under professional pants or uniforms.

Closing Thoughts

The Ibex Woolies Pro Tech 3/4 Length Bottoms are the lightest base layer in the Ibex lineup, great for cool to cold conditions. Thanks to the use of Nuyarn®, the merino wool used in these leggings are warmer, more stretchy, and more durable than normal merino woven fabrics. These are a great option for cold weather activities or for wearing under pants on cold days.

The Ibex Woolies Pro Tech 3/4 Length Bottoms are available for both men and women. Men’s sizing ranges from S to XXL, women’s sizing ranges from XS to XXL.

Erin Trail

Trail Boss of Stoke

Erin Trail’s hobby is collecting hobbies. She’s a 5th Generation Coloradan and grew up exploring the outdoors on family camping trips and hikes. Her first backpacking trip was at eight years old to Grizzly Reservoir – she proudly carried all of her own gear those 3 miles from the main parking lot to the Reservoir.

Erin is an adult-onset athlete who started as a Masters Swimmer and then developed into a triathlete. She has completed 5 Ironman races and nearly 20 x 70.3 distance Ironman races, including the World Championship in Lahti, Finland, in 2023. In 2025, she raced for Team USA in Pontevedra, Spain for the World Triathlon Cross Tri World Championship. She placed 9th in her age group and was the 1st American woman in her age group.

Erin Trail on her mountain bike at the World Tri Cross Triathlon World Championship race

Erin Trail on her running at the World Tri Cross Triathlon World Championship race

Somewhere along her triathlon journey, she picked up deep love of cycling. Cycling encouraged her to see landscapes in a new way, learn new skills and to develop self reliance; now she often goes and does Type 2 rides just to see if she can do it. She’s got all the bikes: gravel, mountain, fat bike, time trial and road.

She is even known to combine her love of camping and cycling and go off on solo 24 hour overnight bikepacking trips in the mountains of Colorado. In addition to bikes, she teaches yoga, lifts weights, skis, SUPs and has recently purchased a campervan.

Erin is a former Montana park ranger with a degree in environmental engineering. She loves getting into technical details while putting her gear (and herself) through the paces. She shares her home in Colorado with her husband, Will, and her 3 cats (Zipper, Brewtus, and Simcoe).

Fall and winter 2025 will bring Erin to the “Adventure Side”, with many camping, vanlife, bikepacking, and mountain bike rides. Once the snow flies, she can be find resort skiing, fat biking, and triathlon training (inside and outside).

2026 will bring a National Championship Cross Tri race, a National Championship Road Sprint and Olympic Distance race, and hopefully a chance to represent Team USA once again in 2027 in Edmonton, Canada. She’ll also save lots of room for adventure time with her friends and husband.

When not adventuring, she can be found on a sunny patio somewhere, drinking beers with her husband.