Shirt collar by PETER HAHN with turtleneck and non-slip rubber. This on-trend piece completes every outfit and is made of soft jersey in 92% viscose, 8% elastane. It is a practical multi-functional piece that stylishly rounds off many outfits. It does not look bulky under sweaters, blouses or knitted dresses and fits perfectly thanks to the non-slip rubber. The shirt collar is machine washable.