Simms - Thermal Midlayer Bottom

Simms – Thermal Midlayer Bottom – Maximum warmth without the bulk.

The Simms Thermal Midlayer Bottom is built to keep you warm and comfortable during the coldest days on the water. Featuring a grid-fleece interior, these pants trap body heat close to the skin while wicking away moisture to keep you dry. The smooth exterior layers easily under waders or outerwear, ensuring unrestricted mobility and all-day comfort. Designed with a focus on warmth without unnecessary bulk, they provide the perfect balance of insulation and flexibility. Whether you’re fishing in frigid conditions, layering up for winter outings, or simply need reliable base warmth, the Simms Thermal Midlayer Bottom delivers dependable performance. Shop online or visit Drift Outfitters in Toronto for expert advice and fast shipping anywhere in Canada.

• Smooth faced grid-fleece layers perfectly with our baselayers to provide maximum warmth
• Self fabric waistband with dual snap closure and zippered fly allow for easy on and off transitions
• Dual slash handwarmer pockets
• Patterned with a gusseted crotch for maximum comfort and easy layering with bibs or waders.
• Tapered hem for a streamline fit when wearing layers underneath and over top

FABRIC TECH: Body - 7.52 oz./yd.² (255gsm) 93% polyester, 7% elastane finished with antimicrobial + moisture management

Q: Why is layering important for fly fishing?
A: Layering helps you stay comfortable and adaptable in changing weather conditions. By combining moisture-wicking base layers, insulating mid-layers, and protective outer layers, you can regulate temperature, stay dry, and fish comfortably in any season — from chilly steelhead mornings to cool alpine streams.

Q: What types of layering clothing do you sell?
A: Drift Outfitters carries a complete range of thermal and layering pieces including base layers, fleece, insulated jackets, and soft shells. These garments are designed to keep you warm and dry without restricting movement, making them perfect for fishing and outdoor adventures year-round.

Q: What materials are best for thermal and layering clothing?
A: The best layering materials include merino wool, polyester blends, and technical fleece. These fabrics wick moisture, dry quickly, and provide warmth even when wet — unlike cotton, which retains water and can cause heat loss in cold conditions.

Q: Which thermal clothing brands do you carry?
A: Drift Outfitters carries trusted performance brands like Simms, Patagonia, and Hooké. These brands are known for their high-quality technical fabrics, comfort, and durability in demanding fishing and outdoor environments.

Q: How do I layer clothing for cold-weather fishing?
A: Start with a moisture-wicking base layer, add an insulating fleece or mid-layer, and top it off with a waterproof or windproof shell. Proper layering traps heat and manages moisture, keeping you warm without overheating.

Q: How should I care for my thermal and layering clothing?
A: Wash according to manufacturer directions. Air-dry or tumble on low heat to maintain performance and prevent shrinkage. Always follow brand-specific care labels for best results.