--- product_id: 474616661 title: "Merino.tech 100% Merino Wool Base Layer Mens - Thermal Underwear Long Johns" brand: "merino.tech" price: "$103.83" currency: USD in_stock: true category: "Merino.Tech" url: https://www.desertcart.us/products/474616661-merino-tech-100-merino-wool-base-layer-mens-thermal-underwear store_origin: US region: United States of America --- # 17.5 micron superfine merino wool OEKO-TEX & RWS certified sustainable wool 3 weight options for precise thermal control Merino.tech 100% Merino Wool Base Layer Mens - Thermal Underwear Long Johns **Brand:** merino.tech **Price:** $103.83 **Availability:** ✅ In Stock ## Summary > 🔥 Stay warm, fresh, and unstoppable in the ultimate merino base layer 🧗‍♂️ ## Quick Answers - **What is this?** Merino.tech 100% Merino Wool Base Layer Mens - Thermal Underwear Long Johns by merino.tech - **How much does it cost?** $103.83 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/474616661-merino-tech-100-merino-wool-base-layer-mens-thermal-underwear) ## Best For - merino.tech enthusiasts ## Why This Product - Trusted merino.tech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Tailored Thermal Control:** Choose from lightweight (165 g/m²), midweight (250 g/m²), or heavyweight (320 g/m²) to match your adventure and climate. - • **Unmatched Softness & Comfort:** Superfine 17.5 micron merino wool feels like a second skin—no itch, all day comfort. - • **Easy Care for Long-Lasting Wear:** Machine washable on delicate, just air dry to keep your base layer looking and performing like new. - • **Sustainably Sourced & Certified:** Australian RWS-certified merino wool ensures ethical sourcing and OEKO-TEX certification guarantees safety. - • **Odor-Resistant & Moisture-Wicking:** Stay fresh and dry with natural wool fibers that outperform synthetics in moisture management. ## Overview These 100% superfine 17.5 micron merino wool men's base layer pants offer lightweight to heavyweight options (165-320 g/m²) for year-round thermal regulation. Designed for active professionals, they combine itch-free comfort, natural odor resistance, and moisture-wicking performance. Ethically sourced from RWS-certified Australian merino and OEKO-TEX tested, these thermals are machine washable and built to last—perfect for hiking, skiing, or daily winter wear. ## Description Buy Merino.tech 100% Merino Wool Base Layer Mens - Thermal Underwear Long Johns (Large, 165 Black) and other Bottoms at desertcart.com. Our wide selection is elegible for free shipping and free returns. ## Features - LIGHTWEIGHT: Mens Merino Base Layer Available in: Lightweight 165 g/m², Midweight 250 g/m², Heavyweight 320 g/m². Merino Wool Hiking Socks ($21 Value!) - Lightweight Merino Wool Pants for Men 165 g/m² and Wool Socks. Cool Packaging! Makes A Great Gift! - SUPER SOFT & COMFORTABLE: 100% Superfine 17.5 Micron Merino Wool Underwear Mens provide all day comfort and no itch! Designed for daily wear without rubbing and overheating of regular cotton. - MOISTURE WICKING & ODOR RESISTANT: Merino long underwear mens natural wicking and odor-resistant properties allow it to absorb moisture better than any other fabric, keeping you dry and fresh. - EASY CARE: Washer/dryer safe. For longer lasting wear, hand wash and air dry. Midweight Merino Wool Base Layer Mens naturally regulates body temperature to keep you comfortable all year round. - ZERO WORRIES: Every Merino.tech Merino pants thermals for men we make is backed by our Merino.tech Promise - ensuring you're 100% happy with every Merino.tech purchase. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09T6W2K5R | | ASIN | B0B8SP5PPG | | Age Range Description | Adult | | Apparel Closure Type | Pull On | | Apparel Fabric Stretch | Medium Stretch | | Apparel Fabric Weight Class | Medium Weight | | Apparel Occasion and Lifestyle | Athletic | | Best Sellers Rank | #6,126 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #5 in Men's Thermal Underwear Bottoms | | Brand Name | Merino.tech | | Color | 165 Black | | Customer Reviews | 4.6 4.6 out of 5 stars (3,628) | | Date First Available | June 22, 2021 | | Department | mens | | Fabric Stretchability | Stretchable | | Fabric Type | 100% Superfine Merino Wool | | Fit Type | Standard | | Fit to Size Sentiment | Fits True To Size | | Front Pleat Type | Flat Front | | Garment Size Country | United States | | Import Designation | Imported | | Item Length Description | Standard Length | | Item model number | 165 | | Leg Style | Skinny | | Manufacturer Part Number | MP-250 | | Material Type | 100% Superfine Merino Wool | | Model Name | Men Pants | | Number of Items | 1 | | Occasion Type | Hiking | | Package Dimensions | 10 x 9 x 0.7 inches; 4.8 ounces | | Pants Form Type | Leggings | | Pattern | Solid | | Pattern Style | Solid | | Pocket Description | No Pocket | | Product Care Instructions | Machine Wash (Delicate Cycle), Hand Wash Recommended | | Rise Style | Mid Rise | | Seasons | All | | Specific Uses For Product | Hiking, Sports, Yoga | | Sport Type | Hiking, Snow Skiing, Snowboarding, Camping and Hiking, Running, Climbing, Mountaineering, Cycling | | Style Name | Modern/Fitted | | Style Number | MP-250 | | Team Name | Sports | | Ultraviolet Protection Factor | UPF 50 | | Unit Count | 1 Count | | Weave Type | Knit | ## Images ![Merino.tech 100% Merino Wool Base Layer Mens - Thermal Underwear Long Johns - Image 1](https://m.media-amazon.com/images/I/317nkS7VBXL.jpg) ![Merino.tech 100% Merino Wool Base Layer Mens - Thermal Underwear Long Johns - Image 2](https://m.media-amazon.com/images/I/413AuDZQ83L.jpg) ![Merino.tech 100% Merino Wool Base Layer Mens - Thermal Underwear Long Johns - Image 3](https://m.media-amazon.com/images/I/51bPRhBNpCL.jpg) ![Merino.tech 100% Merino Wool Base Layer Mens - Thermal Underwear Long Johns - Image 4](https://m.media-amazon.com/images/I/51amr+Ed1+L.jpg) ![Merino.tech 100% Merino Wool Base Layer Mens - Thermal Underwear Long Johns - Image 5](https://m.media-amazon.com/images/I/41smOVIFBGL.jpg) ## Available Options This product comes in different **Color, Size** options. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/474616661-merino-tech-100-merino-wool-base-layer-mens-thermal-underwear](https://www.desertcart.us/products/474616661-merino-tech-100-merino-wool-base-layer-mens-thermal-underwear) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-10-20*