TEMARINO Wool Underlay The TEMARINO Wool 12mm Underlay adds a plush layer of cut pile natural wool to your bed, designed for year-round comfort. The winter side features 12mm Australian wool for warmth and softness. The reversible summer side uses 150gsm New Zealand Joma wool, topped with breathable cotton for a cooler, lighter feel. Together, they offer a naturally balanced sleep—whatever the season.. Made with a plush 12mm cut pile wool layer and designed to be reversible, this underlay fits securely with a cotton skirt for year-round comfort. The winter side features dense Australian wool for added warmth. In warmer months, simply flip it over to the summer side—featuring 150gsm New Zealand Joma wool with a breathable cotton cover. Key Details Wool Pile: 12mm thick Material: 500-thread count cotton Filling: 1000gsm New Zealand wool Design: Reversible for a skirted snug fit