| Icebreaker | Renowned for ethical sourcing and high-performance merino; excels in breathability and odor resistance, frequently topping 2025 reviews for versatility in outdoor activities. | Merino 200 Oasis Long Sleeve Crewe (100% merino wool) | icebreaker.com (North American site ships to Canada) |
| Smartwool | Pioneer in merino base layers; praised for softness, warmth, and durability in tests like GearJunkie and Switchback Travel's 2025 guides. | Classic All-Season Merino Base Layer (100% merino wool) | smartwool.com (Canadian site available) or MEC.ca |
| Unbound Merino | Specializes in 100% merino for travel and daily wear; lauded on Reddit and review sites for anti-odor properties and lightweight packability. | Long Sleeve Merino Crew (100% merino wool) | unboundmerino.com (ships to Canada) |
| Ortovox | Premium choice for mountaineering; 2025 Outdoor Gear Lab highlights its moisture-wicking and temperature regulation in harsh conditions. | 185 Rock'N'Wool Long Sleeve (100% merino wool) | ortovox.com (Canadian English site) |
| Minus33 | Affordable, U.S.-made 100% merino; excels in heavyweight warmth for cold weather, with strong availability on Canadian platforms. | Expedition Wool Crew Top (100% merino wool) | minus33.com (ships to Canada) or Amazon.ca |