Smartwool’s Top-Rated Base Layer Dubbed the ‘Best on the Market’ Is 30% Off at REI
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The REI Holiday Warm Up Sale kicked off today just in time to find last-minute gifts for outdoorsmen and adventurers. But more importantly, it offers an opportunity to grab some of the best winter gear, like puffer jackets, boots, and snow pants, for yourself at a discounted price. Smartwool has a ton of products featured during the sale, but there’s one specific base layer that’s a must-grab.
Right now, the men’s Smartwool Classic Thermal Merino Quarter-Zip base layer top is on sale for just $84—$36 off the original price of $120 as part of REI’s 30% discount on all Smartwool clothing for adults. It’s the No. 4 bestseller of all men’s Smartwool products (out of nearly 200) and ranks eighth among all men’s base layers at REI. After almost 600 total ratings on the site, it’s maintained a 4.8-star average with 97% of all customers recommending it.
Smartwool Classic Thermal Merino Quarter-Zip Base Layer Top, $84 (was $120) at REI 
This Smartwool men’s base layer is made of 100% merino wool—the material that put the brand on the map. It’s designed with shoulder panels instead of top seams, which boosts comfort, alongside the flatlock seam construction that reduces the potential for chafing. Other than the zipping mechanism and the wind guard collar, there’s not too much else in the way of design—it’s pretty simple. The true magic lies in the material. Merino wool is naturally breathable, temperature regulating, and odor resistant, and Smartwool has found a way to use it more creatively than most other brands.
The brand might be a champion for men’s base layers, but that’s not all it’s known for. Smartwool is a master of coziness with wool leading the charge. The brand makes some of the best wool socks, fleece hoodies, and sporty jackets for men. Across the brand’s selection of apparel and accessories, shoppers note that quality and reliability are evident strengths, regardless of the style.
Smartwool Classic Thermal Merino Quarter-Zip Base Layer Top, $84 (was $120) at REI 
That’s what many have said in reviews about this quarter-zip base layer. One shopper even went as far as saying it’s the “best on the market.” But it’s a sentiment that’s echoed among the 145 shoppers who left reviews
One shopper who planned a months-long hike knew choosing Smartwool would pay dividends. “I’m going to use this as my base layer for my 2024 AT (Appalachian Trail) thru-hike,” they said. “Since I start mid-February, it’s going to be cold. This is very lightweight wool and will keep me warm even if it gets wet. It’s very comfortable and actually stylish.”
Other shoppers take advantage of this base layer’s versatility. “The quality of the merino is good and the styling is excellent,” another shopper said. “It can be used as a genuine base layer, as an outer layer, or stand-alone sweater.”
Regardless of how you choose to use it, having a reliable base layer to keep you comfortably warm in the winter is something every guy should have. Thankfully, during REI’s Holiday Warm Up Sale, all Smartwool clothing for adults, including the Classic Thermal Merino Quarter-Zip base layer, is 30% off. But don’t wait too long to pick one up—prices go back up on Dec. 18.
