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

Based in Cape Town, South Africa and started by Dr. Leatt in 2001, Leatt team of engineers and designers constantly strive to create new and improve existing products. Leatt is a sign of commitment, passion and dedication. Leatt is serious about sports and when it comes to safety, they don’t accept half-measures. 
 
SIZE
XS
S
M
L
XL
2XL
3XL
4XL
5XL
WIST
68-73
73-78
78-83
83-88
88-93
93-99
99-104
104-109
109-115
INSEAM
76-78
78-79
79-81
81-83
83-85
83-86
84-86
85-87
86-87
HEIGHT
162-168
168-172
172-178
178-182
180-185
182-188
183-188
183-190
184-193

Measurements in Centimetres
Waist - Measure the circumference at narrowest part of your waist just above your hip bones.
Chest - Start by placing a measuring tape around the largest part of your chest. The tape should be flat but not too snug.