To investigate, we did a deep dive to find the perfect pair of flannel pajamas . Despite our admittedly low expectations, we were pleasantly surprised to find a selection that didn't disappoint. From the plaid and gingham sets you know and love to fun and festive pairs too good to pass up, winter sleepwear is better than ever before. So next time the elements have you itching for a good ol' fashioned night in, try a pair of the 15 flannel pajamas ahead, and finally master cold weather hygee once and for all.