Everlasting Comfort Memory Foam Seat Cushion and Lumbar Support Pillow ComboFeatures our office chair cushions feature premium gel infused memory foam with heat responsive technology that adjust to the curves of your body for better support. Strategic ventilation holes in the memory foam of our gel seat cushions allow air to circulate throughout, never trapping heat so you always sit comfortable and cool Our back pillow for office chair cradles your upper, middle, and lower back, providing the lumbar support needed to