Our warmest base layer top for those who feel the cold. The Women&';s Heavyweight Grid Fleece Crew is crafted from our 280gm Signature Merino Blend fabric that melds the luxuriously soft on-skin properties of rayon from bamboo and the unrivalled odour resistance of merino wool. We&';ve engineered the interior with a 3D grid texture for added micro-air-pocket warmth and an extra soft skin touch.