For women looking for a thermal activewear vest specifically designed for training, the adidas Women's Tiro 19 Training Vest is a great choice. This vest is made from a blend of polyester and elastane, offering a comfortable and stretchy fit. It features a full zip closure and a stand-up collar for added warmth and protection. The vest also has zippered pockets, perfect for storing small essentials. With its sporty design and reliable performance, it's no wonder this vest is a best seller on Amazon.