Whether you are hitting the slopes or setting up camp for the weekend, don't forget to pack your Merino wool base layers to keep you warm and comfortable for the adventure that lies ahead. Choose from our midweight or heavyweight options.

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Built For Adventure

At Ridge Merino we create simple, everyday apparel with the mettle to weather expeditions, insulate adventures and soften the daily grind. Our base layers are no exception when it comes to technical apparel you can rely on. Whether you're climbing Mt Whitney or skiing the resort, our Merino base layers will move with you.

Discover Merino Wool

Our Merino wool base layers are the perfect foundation for outdoor activity when the temps dip. The Aspect Midweight Merino wool Base Layer is warm yet versatile and feature a new exclusive design that feels great next to your skin and will keep you warm, dry and comfortable. Reinforced with our exclusive (m)Force Technology, the Aspect Series offers improved strength and durability.

Fabric You Need to Feel to Believe

Merino wool is soft, breathable, and temp-regulating, making it perfect for any adventure. Shop our Merino base layers and experience the difference.


We let our reviews speak for themselves.

"I love this top! It’s comfortable (soft) and light weight but warm and the high neck is nice for skiing to protect from cold wind! It has a flattering fit too!"

Karin H

Aspect High Neck Top

"These are the perfect length so they don't get bunched up in ski boots. Warm, wick well and comfy."

Paul J

Aspect Midweight 3/4 Length Bottom

"I have 6 of these shirts now, I love them. I'm 6'5" 205 and have long arms it's hard to find clothes anywhere. I like an athletic fit and these are perfect."

Anthony F

Aspect Midweight Crew

"So warm and I absolutely love the high waist!!"

Sophia B

Aspect High Rise Bottom

"Exactly as described, warm and breathable, well built and soft, stretchy with a good fit, bought it for running since my last wool quarter zip has worked so well and not gotten stinky."

Mark H

Aspect Midweight Crew 1/4 Zip

"These are the warmest and tough under layer I have ever owned. I will be buying more."

Nolan W

Aspect Midweight Crew