Leatt Vest MTB Therma Flow 5. 0Windproof Protection The Leatt Therma Flow 5. 0 Vest keeps your core warm and protected without overheating, ideal for high-effort rides in cold, dry conditions. Its custom-developed double weave fabric combines a windproof, water-resistant outer shell with a ventilated fleece interior made with lightweight, thermally efficient GRAPHENE yarn. Designed without a laminate, it prioritizes airflow while sealing out wind and light moisture with a PFAS-free dirt- and water-resistant coating and seam-taped construction. It works great on its own or as a midlayer under a shell when the weather turns. With 4-way stretch for freedom of movement, three zippered pockets for essentials, and Bluesign-approved fabrics for the planet, the Therma Flow 5. 0 Vest offers focused warmth where you need it most. Features The outer layer is totally windproof and water-resistant and the inner layer is made with GRAPHENE - a super light and strong yarn with superior thermal properties Block fleece inner layer has ventilation channels3 pockets with YKK zippers Over the chin coverage for full protection Reflective prints and zipper pulls enhance visibility in low-light conditions Sizing Size Extra Small Small Medium Large Extra Large XX-Large XXX-Large Arm Length (cm)74 - 76cm76 - 78cm78 - 80cm80 - 82cm82 - 84cm84 - 86cm86 - 88cm Arm Length (in)30 - 30. 5"30. 5 - 31"31 - 31. 5"31. 5 - 32"32 - 33"33 - 34"34 - 35"Chest Circumference (cm)91 - 96cm96 - 102cm102 - 106cm106 - 112cm112 - 116cm116 - 122cm122 - 127cm Chest Circumference (in)36 - 38"38 - 40"40 - 42"42 - 44"44 - 46"46 - 48"48 - 50" | Leatt | Vest Mtb Thermaflow 5. 0 Men's | Size Extra Large In Black