These are certainly not your average sleep masks. Merino wool breathes and wicks moisture away from your skin to keep you incredibly comfortable. It also wears well; silk tends to catch and scuff. Our masks are made with three very specific layers of merino wool. Against your face is a superfine Italian suiting material. The outside layer is also Italian, but not quite as fine. The inside, middle layer, is a thicker black merino knit which breathes beautifully yet blocks out even the rudest aircraft cabin lighting. And we can guarantee a perfect fit because we use velvety-soft elastic straps and adjustable sliders. There’s also a circular dot sewn into each mask indicating a relaxation acupressure spot on your forehead, which you can gently massage.