When you lean on your arm at Tachanun. The arm you lean on can it be bear skinned or do you have to wear a jacket/or have a tissue(some sort of chasisah between your head and the bear skin of your arm. This happened, and I like to check the Halachah.

Thank you for your question, The minhag is to cover your face with a jacket or shirt (Mishna brura 131;3). Harav Avigdor neventzhal (beyitzhchak yikare on the Mishna brura) explains that the purpose is to make some chatziza between one's face and the ground. Therefore if one's face is above a table or a 'stender' that is good enough. See also penieni halacha (21;4, comment 4). All the best