MTB Thermaflow 4 jacket.0 v26.Leatt MTB Thermaflow 4 jacket.0 - Thermal and aerodynamic performance for winter.The Thermaflow 4.0 is a high-performance technical jacket designed for cycling in cold weather.Its snug next to skin fit and ergonomic cut adapt perfectly to aggressive positions on the bike, while its strategic combination of fabrics provides thermal insulation where it is most needed, without sacrificing breathability or mobility.With wind-resistant front panels and a stretchy and breathable warmyarn fabric on the back, it offers an optimal balance between weather protection and active ventilation.Its technical construction includes five rear pockets, a hidden front pocket for the mobile phone and reflective details for maximum functionality on long autumn and winter outings.Outstanding features.Next to skin fit for maximum aerodynamics and thermal control.Pre-shaped ergonomic sleeves and longer back with non-slip silicone print.Strategically located technical fabrics for an ideal fusion of insulation, ventilation and elasticity.Welded finishes and hidden seams for greater comfort.Advanced technical fabric.Front and sleeve panels:wind resistant with brushed interior for insulation.Back panels and rear sleeves:stretchy warmyarn with natural antibacterial and antistatic properties.Quick drying to keep you dry even during intense efforts.4-way stretch in all directions for total freedom of movement.Protection and ventilation.Dwr c0 pfas-free treatment (ecological water and dirt repellent).Ideal balance between frontal wind protection and strategic rear ventilation.Functional storage.5 rear pockets:3 top access and 2 with zipper.Laser front pocket with zipper ideal for the phone.All pockets are made of elastic and water-resistant fabric.Additional details.Reflective print on the lower back for greater visibility.High quality ykk zippers, including front zipper with non-slip puller (ykk vision). Sustainability.bluesign® certified fabrics, guaranteeing a responsible and safe production process.Plastic-free packaging.Sizes available.Xs to 3xl (size 3xl only in black).Who is this jacket for?The thermaflow 4.0 is designed for cyclists looking for a technical, lightweight, and fitted jacket for intense riding in autumn and winter.Perfect for trail, xc, or gravel, it offers frontal warmth, rear ventilation, and outstanding ergonomics.It is an ideal option if you are looking for aerodynamic and thermal performance without sacrificing comfort or sustainability.