Leatt Bib Long MTB ThermaFlow 4.0

Insulated warmth, comfort, and storage—made for cold miles.

The ThermaFlow 4.0 Bib is built for cool-weather rides when you need comfort, coverage, and cargo. Made from Leatt’s ultra-stretchy WarmYarn fabric with a brushed interior, it offers insulation without compromising breathability or mobility. The upper section is made for moisture management below your jersey and jacket, while super-soft, ventilated suspenders stay comfortable from start to finish. An integrated Elastic Interface chamois is designed specifically for gravel riding and semi-aggressive riding positions , with dual-density foam and a ventilated front for long-mile support. Two mesh cargo pockets on the back and two on the legs keep essentials close at hand, while reflective accents increase visibility in low light. Treated with PFAS-free DWR and made from bluesign® approved materials, it’s your go-to bib when the temperature drops and the miles stack up.

• FIT: Skin fit • 3D body anatomic shape • 4-way stretch • Silicone leg grippers • Pre-shaped ergonomic legs
• FABRIC: Made from a super elastic WarmYarn knit, giving very good insulation and heat management with natural antistatic and bacteriostatic properties • Backside of fabric brushed for insulation • Super breathable and quick drying • Hidden seams with overlocked stitching inside for comfort
• SUSTAINABILITY: bluesign® APPROVED fabric (the gold standard for more sustainable textiles) • Plastic-free packaging
• WEATHER PROTECTION: Treated with DWR C0, PFAS(PFC)-free, for a more environmentally friendly dirt and water repellent finish • UPF 50+ sun protection (blocks 95% of UVA and 98% of UVB rays)
• VENTILATION: Upper part of garment incorporates mesh fabric for maximum air flow • Super-fine, soft elastic webbing suspenders with ventilated structure
• STORAGE: 2 elastic mesh cargo pockets on lower back and legs
• CHAMOIS: Elastic Interface chamois, anatomic/3D shaped for semi aggressive riding position • Dual density foam and ventilated front • Made in Europe • Designed specifically for gravel riding
• OTHER FEATURES: Antibacterial treated • Reflective print details • Top quality zippers made by YKK
• SIZES: XS-3XL (28-40’’) (3XL only in black)