Set the leather chair in a warm room and wait for it to thaw. Sometimes leather freezes or stiffens in cold temperatures. This is particularly true during transport in the winter months.
Sit down in the leather chair and then get up again. Sometimes the leather isn't the problem; rather, the problem is the new, firm fiber and foam in the cushions.
Repeat sitting down in the leather chair approximately 10 times to help break in the hard cushions. This loosens the cellular structure. Every time you sit in the leather chair makes it more comfortable; therefore, regular, everyday use is best.