Merino Wool Underlayer (bottom)
![](https://www.simplymerino.com/cdn/shop/products/thermal-underlayer-bottom-children-up-to-age-12-simply-merino-clothing-co-2t-chocolate-792183_683x1024.jpg?v=1693264175)
Simply Merino thermal bottoms work great as a thin layer under all of your kids sporting gear. The fabric breathes, and wicks moisture away from the body.
Fit is true to size, but we always recommend sizing up for longer wear.
*Our thermal bottoms have straighter and longer legs making them a tighter fit than our PJ bottoms.
NOTE: Price is for pants only - the top is sold separately so you can mix and match colours and sizes.
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REI Co-op Merino Midweight Base Layer Bottoms - Men's
![](https://cdn2.smartwool.filoblu.com/media/catalog/product/cache/25162cc576cf81151d28507649e6339b/s/w/sw0163620921_01_new.jpg)
Men's Classic Thermal Merino Base Layer Bottom col. Blue
Stay warm, dry, & smelling great day after day in nature’s most advanced performance fabric., These ultra-soft Merino base layer bottoms provide
![](http://www.woolx.com/cdn/shop/products/x509-001-2.jpg?v=1662386237)
Backcountry Leggings
![](https://www.koraoutdoor.com/cdn/shop/files/topimage_c070dab5-6912-48b1-a17d-e11eb0e80a65.jpg?v=1665039089&width=1500)
Merino wool base layers blended with yak wool – kora
![](https://www.minus33.com/cdn/shop/files/7112Artboard6.jpg?v=1711121229&width=1080)
Minus33 Merino Wool Clothing Chugach Men's Expedition Zip-Off 3/4
Embracing the remarkable natural traits of Merino wool, our Merino Base Layer seamlessly becomes a cyclist's second skin. Its unique ability to adapt
![](http://www.lapassione.cc/cdn/shop/files/MerinoBaseLayerBlackLS-1X.jpg?v=1698673280)
Merino Long Sleeve Base Layer Black: Men's Cycling Clothing
![](https://www.simplymerino.ca/cdn/shop/files/thermal-underlayer-bottom-children-up-to-age-12-simply-merino-clothing-co-2t-charcoal-dark-grey-242061_768x1024.jpg?v=1709653584)
Merino Wool Underlayer (bottom) Simply Merino Clothing Co– Simply Merino Canada
![](https://www.ridgemerino.com/cdn/shop/products/34002-BLKBACK_2048x.jpg?v=1695856629)
Boys Base Layer Bottoms
Point6 has made the Best Base Layer Ever for the ultimate in comfort when you're in the elements. The only company using extra fine 18.5 micron
![](http://point6.com/cdn/shop/products/mens_crew_front.jpg?v=1710350047)
Men's Base Layer Long Sleeve Mid-Weight Crew Neck Top
![](https://s3.amazonaws.com/images.gearjunkie.com/uploads/2022/01/IMG_2185.jpg)
The Best Men's Base Layers of 2024
Comfortable, close fit works as your base layer outdoors; chic and cozy as single indoor layer., This is the crewneck version of our ¼-zip. light
![](http://dakini.com/cdn/shop/products/merino-wool-crewneck-base-layer-topdakini-465590.jpg?v=1699017987)
Merino Wool Crewneck Base Layer Top
![](https://cdn.shopify.com/s/files/1/0253/1626/1993/files/merino-vs-synthetic-9_2048x2048.jpg?v=1626340604)
These are the best Baselayers for hiking, running and cycling
![](https://www.ridgemerino.com/cdn/shop/products/highrise2.jpg?v=1704994598&width=3000)
Women's Aspect Merino Wool High Rise Base Layer Bottoms – Ridge Merino