What Is The Spanish Song That Goes Boom Boom at Kelly Barrios blog Marled Beanie. A classic marled knit, tuned for modern performance. Spun from a merino wool and acrylic blend, this knit looks like a timeless marled sweater but quietly works harder in the background. Merino helps regulate temperature, breathe easily, and stay fresher for longer, while acrylic yarns adds shape retention and everyday durability. The result is a hat that feels at home over a tee on cool city mornings, in transit, or pulled on for a long evening outside. Rich texture on the surface, technical know how in the fibres, so you reach for it again and again.