This thermal top uses a combination of two of Rooster's most popular fabrics. The main ‘heat’ boosting properties of this top derive from its 0.5mm titanium lined neoprene used at the chest, back and upper arms. This fabric is a clever material that works with your body to regulate your temperature, where the titanium lining reflects heat from your body back onto your body, rather than letting it escape through the fabric. Through combining this ‘Hot’ fabric with our soft and stretchy Polypro™ on panels where you want the maximum movement and breathability, underarms, sides, neck and lower arms, this top is set for thermal comfort and performance. Wear it next to your skin for the best performance. It’s a great heat boost for underneath your other layers on colder days or on it’s own for very active sports.  Features:•    Titanium lined 0.5mm ‘Hot’ neoprene at main body and upper arms•    Polypro fabric at sides, underarms, neck and lower arms•    Scooped hem at back for a flattering fit•    Thumb loops at cuffs•    Double lined high neck Polypro collar•    4 way stretchMaterials:•    Titanium lined 0.5mm neoprene•    Polypro   XXXS XXS XS S M L XL XXL Height (cm) 141 153 156-162 162-167 172-177 182-187 187-193 187-193 Chest (cm) 78-80 80-87 81-86 86-91 97-101 107-112 112-117 117-122 Waist (cm) - - 58-64 69-74 79-84 89-94 94-99 99-107