The Wise360 adults base layer top combines comfort with practicality to create a multi-purpose and effective layer. Crafted using Quick Dry fibres, this style of top is able to swiftly wick away sweat to help you stay dry and fresh. The short zip neck can be used for a boost of ventilation when wanting to cool down quickly, or kept up for snug warmth. Flat seams ensure comfort on the move. Can be worn easily with other layers without feeling restrictive. Material: 100% Polyester. Trespass Mens Chest Sizing (approx): S - 35-37in/89-94cm, M - 38-40in/96.5-101.5cm, L - 41-43in/104-109cm, XL - 44-46in/111.5-117cm, XXL - 46-48in/117-122cm, 3XL - 48-50in/122-127cm. Ref: UTTP3853