There is a horizontal bar in the back that prevents the knees being bent. Very thick shearling fleece interior padded footbed supple suede outers with an outdoor gum type rubber sole. Absolutley georgus shoes! Super easy to remove! Comfortable, soft ear pads that look and feel just like the pads that came with the headphones when I bought them. Day one and I am happy. Schade, sehr schade, gerade dachte ich ich hätte einen sehr guten Bluetooth KH gefunden. Nulla a che vedere. No sweating (although it is winter). The ear pads are small & don?t fit comfortably on adult ears.