• GuardMerino155™ fabric: dual-layer merino wool (inside) / polyamide (outside), 155 g/m², Drytech C0 water-repellent treatment
• GuardMerino250™ fabric on torso and shoulders: 250 g/m², dual-layer merino/polyamide, Drytech C0 water-repellent treatment, 100% warp stretch and 80% weft stretch
• GuardRogue™ side panels: 107 g/m², tight weave windproof, Drytech C0 treatment
• Unisex
• Thermal Map™ body mapping: strategic fabric placement based on heat loss zones
• Hood with RigidVisor™ rigid visor and EverdryAero™ HoodBand™ headband
• Two large front Dump Pocket™ pockets and one side LightStuffPocket™
• Rear PackablePocket™ allowing the jacket to be packed into itself
• CleanSeal™ seamless bonded finishes
• Adjustable Cordlock™ (hood) and Sealing Cordlocker™ (hem) drawcords
• Mid-length sleeves
• Thermal protection CLO 0.40 to 0.60, operating range from 10°C to -10°C
• Air permeability: 100 L/m²/h
• Weight: 310 g in size M
• Compacted volume: 1.4 L in size M
• Lifespan: over 10,000 km
• Durability: over 100 wash cycles

Designed in France and manufactured in Europe, the Thermal Shell 333 combines three technical fabrics with complementary properties. The hollow fibres of merino wool absorb up to 20% of their weight in moisture, creating an effective thermal barrier warmed by the body. The GuardRogue™ side panels lighten the overall construction while maintaining wind protection. This multi-zone design allows the jacket to be worn while running as well as during roaming, from early morning through to bivouac.

Mathis is 185cm tall and wears size M.