These long-sleeved thermal vests use our clever Heatgen™ technology to create a cosy, lightweight base layer. Regular fit with Flexifit™ 360 degree stretch, so your vest moves with you and holds its shape. Heat-sealed labels and super soft seams that feel gentle against your skin. Moisture-wicking fabric keeps you dry and comfortable. Made with sustainably sourced viscose. All of the cotton for our clothing is sustainably sourced and always will be.