Wearing a yarmulke is a minhag. Not putting a stumbling block is d'oreisa. Yet, I have noticed that Torah observant boys and young men play sports like basketball, flag football, and soccer with ...
It seems like almost major rebbeim/poskim do/did ear some sort of additional head covering (black hat, streimel, cap, etc) for davening. If the practice is that universal among gedolim, that might ...
It seems that wearing a hat is required, because the Shulchan Aruch says you need to wear a double covering. But some apparently-frum men don't wear a hat. How is this possible?