For cold winter days around the house, nothing beats the warmth of these flannel pajamas. Just the right thing for lounging or sleeping, Size S = 32-36 chest 115-135 LBS M = 36-40 chest 135-165 LBS L = 40-44 chest 165-185 LBS XL = 44-48 chest 185-210 LBS XLT = 46-48 chest 2XLT = 50-52 chest 3XLT = 52-54 chest, they are made of 100% cotton, Machine wash and dry recommended