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🧥 Elevate your base game—comfort that works as hard as you do!
Crafted from 100% superfine 17.5 micron Merino wool, this men's thermal base layer shirt offers superior softness, natural moisture-wicking, and odor resistance. Designed for all-season wear, it regulates body temperature to keep you comfortable whether layered or worn alone. With UPF 50 sun protection, medium stretch fabric, and easy care instructions, it’s the perfect versatile shirt for active professionals seeking performance and style.






































| ASIN | B0CLB648RB |
| ASIN | B0G6CZ3Z8M |
| 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 |
| Back Style | T Back |
| Best Sellers Rank | #71,368 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #23 in Men's Base Layers #30 in Men's Thermal Underwear Tops |
| Brand Name | Merino.tech |
| Color | 190 Black |
| Cuff Type | Plain Hem |
| Customer Reviews | 4.5 4.5 out of 5 stars (774) |
| Date First Available | December 11, 2025 |
| Department | mens |
| Embellishment Feature | No |
| Fabric Stretchability | Stretchable |
| Fabric Type | 100% Superfine 17.5 μ Merino Wool |
| Fit Type | Regular |
| Fit to Size Sentiment | Fits True To Size |
| Garment Size Country | United States |
| Hemline Form | Straight Hemline |
| Import Designation | Imported |
| Item Length Description | Standard Length |
| Item model number | MLS-190 |
| Manufacturer Part Number | MLS-190 |
| Material Type | 100% Superfine Merino Wool |
| Model Name | Men Ls Performance |
| Neck Style | Crew Neck |
| Number of Items | 1 |
| Occasion Type | Vacation |
| Pattern | Solid |
| Pocket Description | No pocket |
| Product Care Instructions | Machine Wash (Delicate Cycle), Hand Wash Recommended |
| Seasons | All |
| Shirt Form Type | Sport Jersey |
| Sleeve Length Description | Long Sleeve |
| Sleeve Type | Long Sleeve |
| Sport Type | Hiking, Snow Skiing |
| Style Name | Modern |
| Style Number | MLS-190 |
| Ultraviolet Protection Factor | UPF 50 |
| Unit Count | 1 Count |
| character | Sports |
| collar-type | Collarless |
| top-style | Shirt |
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