하이킹, 배낭여행, 여행을 위한 최고의 미드 레이어(2026)

In a layering system, the bulk of the warmth comes from your mid layer—that is, the garment that sit on top of your base layer and traps your body heat to keep you warm. Fleece, merino wool, down, and synthetic fills can all be great mid layers. In our guide to layering, we suggest a four-layer clothing cake that consists of a base layer, mid layer, puffer jacket, and an outer shell like a rain jacket. This system is versatile and will keep you warm and dry, while remaining as lightweight as possible. Here's our guide to the best mid layers for every outdoor activity. Don't forget to check out the rest of our outdoors coverage, and also read our dedicated guides to the Best Base Layers, Best Puffer Jackets, and Rain Jackets to complete your layering system. The Best Basic Fleece Jacket The traditional pile fleece is much-maligned these days. In terms of warmth to weight ratio, it does not top the Reddit ultralighter's spreadsheet, but the price is right and the weight difference compared to a newer grid fleece or alpha fleece is not massive. If you're just getting started hiking and backpacking, this is my top pick. We used to call this a 100-weight fleece. They last forever, too. I've been hiking with some version of a half-zip pullover fleece for 30 years now (I still have and use a Marmot version from about 1995). It just works. Like all fleece jackets, Decathlon's HM 100 Hiking Fleece keep you warm by trapping body heat. Unlike down, it stays warm even when damp or downright wet (though wearing wet fleece is an unpleasant experience even if you are warm). It is breathable enough to help move moisture away from your base layer. It will also dry while you're wearing it. This is a minimalist's dream jacket, there are no thumb loops, no pockets, and no hood. It doesn't even have elastic on the cuffs. I find the lack of features to be a feature, but if you really must have more bells and whistles, Decathlon also makes the MH 120 Hiking Jacket which has a full zip and pockets, but weighs in at 12 oz for a men's medium (vs 7.9 oz for the MH100). Grab a good base layer, a good puffer jacket, and a good rain jacket to go with this, and you'll be good to go in most three-season hiking environments. The Best Grid Fleece The is the most minimal option in Patagonia's extensive R1 Air line of grid fleece jackets. Like the Decathlon above, it's a 1/2 zip pullover with no pockets and no hood. I find the minimal cut fine for hiking and backpacking where I'm usually wearing it while moving and don't need pockets. If you want something more for lounging there's also the R1 full-zip hoody, which adds pockets and a hood, but weighs 5 oz more in men's large. The R1 Air is a grid fleece. Have a look at our guide to understanding the various types of fleece on the market for a complete overview, but the short story is that with grid fleece, a grid pattern with elastane stitching is woven in to create the waffle-like texture. This has two advantages over the traditional fleece, the main being that it's much more breathable than a standard fleece. The other is that it's less bulky and packs down smaller. The downside is that grid fleece doesn't block the wind quite as well and it doesn't dry as quickly. That said, for hiking in cooler weather, a grid fleece under a wind shell is a hard combo to beat. It keeps you warm but also allows your sweat to wick away, and keeps you much drier and better thermoregulated than a traditional fleece under the same conditions. Most Durable Ultralight Finally, the lightest option that I've tested is Patagonia's Nano-Air, which itself comes in three different weight classes per square meter: 20g, 40g, and 60g of insulation. 20g is the lightest possible weight, and Patagonia measures the men's medium to weigh 7.7 ounces. I'm testing the women's extra-small and it's barely even noticeable. This is what you wear when you want just a little more insulation than a base layer under a rain shell. I have been trail running, hiking, biking, climbing, and camping in the 20g Nano Air pullover for a year now and this is my favorite insulating mid layer. Patagonia has made a proprietary fabric for the shell called FullRange that has been treated for both water and abrasion resistance, so it's much more durable than the feathery, high-loft alpha direct fleece that I was using before. It's made from 100 percent recycled polyester synthetic down and cut extremely slim to fit underneath jackets, backpacks, and climbing harnesses. I wore this in multiple 30- to 40-degree trail races underneath my race vest and only noticed it because I did not die of cold at the start or finish lines. This is an extremely minimalist pullover—it only has a small chest pocket to use as a stuff sack—but you can also buy it in heavier weights or configurations, like a hoody.—Adrienne So Best Ultralight Octo Fleece Arc'teryx's Delta Jacket is an ultralight fleece made of Octa Fleece, one of the newer, high-tech fleeces to hit the marke