Merino wool is soft next to skin, keeps you cool when it’s hot and warm when it’s cold, and moves moisture away from your body. Butit often wears out quickly, which is a problem because merino apparel is expensive. Luckily, there area bunch ofstaples available through Amazon’s Prime Day mega-sale. Here are some of the best.

Icebreaker Spector T-Shirt (Men’s): $45
Lightweight merino wool T-shirts are the ultimate all-aroundbase layers.In warm weather, wear them on their own. In cooler temperatures, layer them under a shirt or sweater. For high-exertioncold weather activities, nothing else will keep you as dry under a lightweight soft shell jacket.
Made from a 90 percent merino, ten percent nylon blend, the featherweightSpector will hold its shape through wear and washes, and keep you cool in even the hottest conditions or through the heaviest activity. For today and tomorrow, it’s discounted from $60 to $45 in select sizes in colors.

Icebreaker Hike+ Light Sock (Men’s and Women’s): $16.50
Years ago, I threw out all of my cotton socks and replaced them with three pairs of these lightweight merino items. Aside from skiing (when I wear something taller), and very cold weather activities (where more insulation is needed), that remains my setup today. These thingswill keep your feet dry and comfortable in anything from snowy hikes in the mid-teensto summer backpacking trips. I wear out those three pairs about once a year, and re-stocking them todayis going to be cheaper than usualbecause they’re discounted from $22 to $16.50 a pair.

Icebreaker Multisport Mini Sock (Men’s and Women’s): $13.50
The only other time you won’t find me in the Hike+ Lights is when I’m working out. These low-cut socks are made from an even lighter, more ventilated merino-nylon blend that helpskeep your feet dry while training.Ankle-height, they look good with a pair of athletic shoes. Today, they’re discounted from $18 to $13.50.

Icebreaker Oasis Base Layers (Women’s): $135
For everyday winter wear, 200-weight merino base layers areperfect. Theywon’t be too warm during exertion, dryquickly, and arethin enough to layer under normal athletic clothes. And you won’t find a better all-round set than Icebreaker’s Oasis range, which are made from 100 percent merino wool. Today you can save $45 if youbuy both.