About this item
Merino bottoms - a godsend
If your ruck is heavy and your trek is long, unless it’s Antarctica cold AF, you don’t need a base layer on your legs. Your pants break the wind and your movement keeps you warm.
But when the sun drops, or your movement is limited and your hatred of the cold rears its head, our merino long johns become a Godsend. They keep you warm when it’s cold and they breathe when the sun reigns down again.
Designed, tested, proven and built in the USA by American craftsmen and women, GORUCK Merino Bottoms come with our Scars Lifetime Guarantee.
Customer reviews (7)
What customers say: These base layers are praised for their warmth and comfortable thermoregulating merino wool, perfect for cold weather layering and active use. Some users, however, find the material a bit itchy or prone to pilling.
★★★☆☆
Decent, but a bit fragile
Ben G. · 2025-11-25 · Verified purchase
They provide good warmth and the material is soft enough. I'm finding them a bit delicate though; after only a few washes, I've noticed some minor pilling around the inner thighs. I followed the care instructions to machine wash cold and lay flat to dry.
★★★★☆
Good, but wish they were longer
Dana P. · 2026-01-15
Bought these for my husband who is 6'2". The quality of the merino wool is excellent and he finds them very warm. However, he mentioned that the length is a bit short for him, riding up slightly at the ankles.
★★★★★
Super comfortable and warm
Luis B. · 2026-06-06 · Verified purchase
These base layer bottoms are a huge improvement over my old synthetic ones. The merino wool is incredibly soft against the skin, no itching at all. They keep me comfortably warm without feeling bulky, which is essential when layering for long outdoor activities. I bought a size L and the fit is just right, next-to-skin without being constricting.
★★★★★
Comfortable and effective
Spencer S. · 2025-08-28 · Verified purchase
Really impressed with how well these perform. The merino wool feels great and they regulate temperature perfectly during variable weather. I got the size M and they fit exactly as described, next-to-skin for layering.
★★★★★
Perfect for cold weather training
Patrick J. · 2025-09-12
These base layers are fantastic. They offer incredible warmth without making me feel overheated during strenuous activities. The fit is snug but not restrictive, making them ideal for layering under my rucking pants. Definitely a quality product for winter training.