The Leatt ADV 3.5 ThermaFlow is a thin, flexible insulation layer designed to fit beneath an adventure riding jacket. Its double-knitted wind-blocking shell uses Leatt WarmYarn technology for warmth and breathability without unnecessary bulk.

Construction and Insulation

• Double-knitted wind-blocking shell made with Leatt WarmYarn.
• Lightweight four-way-stretch Ripstop reinforcement at the seat area for durability and freedom of movement.
• Slimline stretch forearms designed to reduce bulk under an outer jacket.
• Overlocked seams for comfort.

Pockets and Details

• One chest pocket with a concealed YKK zipper and low-profile puller for comfort beneath riding gear.
• YKK main zipper.
• Reflective visibility detailing.
• Garment hanging loop.

Supplier-Listed Material Claims

• UPF 50+ rating.
• Bluesign-approved materials.
• Supplier states the product meets the latest USA PFAS standard; no specific standard or test documentation is identified in the supplied listing.

Color, Sizes and Additional Details

• Color: Stealth Black/Grey.
• Sizes: S, M, L, XL, 2XL, 3XL and 4XL.
• 5-year warranty, subject to Leatt's warranty terms.
• Plastic-free packaging.

Fit description to confirm: the supplied introduction describes a relaxed fit, while the technical details describe a fitted body to reduce bulk beneath an outer jacket. The source does not resolve this difference.