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Don't mess around with warmth when it comes to base layers; go with what works. The Hot Chillys MTF 4000 Top has been tested and honed to what it is now. The MTF 4000 is an insanely versatile layer; at home anywhere you need a little extra warmth. Made from Moisture Transfer Fibers (MTF), this layer readily moves moisture away from the body, keeping you dry and happy. With the MTF 4000, versatility is the name of the game.
Interlocked Polyester with MTF (Moisture Transfer Fibers) – Hot Chillys exclusive MTF technology moves moisture away from your body, keeping you warm, dry, and comfortable.
4-Way Stretch – Fabric hugs your body and moves with you, eliminating extra bulk, providing a full range of motion, and improving performance.
Anti-Microbial Treatment – Odor Blocking Properties (OBP) fabric is treated with special "chilly seasoning" for freshness and odor control. This helps your social life.
Snug fit that is well-articulated
Ultraviolet Protection Factor – 30+ UPF, 96.0% - 97.4% protection from UV rays
Warmth Factor 7 – Designed for excellent moisture management and slightly greater warmth
Product Care – Machine wash cold water on delicate cycle. Tumble dry low and remove promptly. Don't bleach or iron.