LEATT MTB ThermaFlow 4.0 Long Bib V26 (2026)
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.