The ThermaFlow 5.0 vest keeps the torso warm and protected without overheating, ideal for high-intensity outings in cold and dry conditions. Its custom-developed double-knit fabric combines a windproof and water-resistant outer shell with a ventilated fleece interior made from lightweight and thermally efficient GRAPHENE yarn. Designed without laminate, it prioritizes airflow while protecting against wind and light moisture thanks to a dirt- and water-resistant PFAS-free coating and taped seam construction. It works great on its own or as a mid-layer under a shell when the weather changes. With 4-way stretch for greater freedom of movement, three zippered pockets for essentials, and bluesign® approved fabrics for environmental respect, the ThermaFlow 5.0 vest provides targeted warmth where it's needed most.