With the Difference of Flora Underwear. Fabric Content: Cotton The product is sanforized. Thus, it does not shrink. For long-term use, please follow the washing instructions. XS Size = 45 S Size = 48 M Size = 51 L Size = 54 XL Size = 56 2XL Size = 60 3XL Size = 64 4XL Size = 68 When buying an undershirt, it is useful to pay attention to the fact that it is made of fabrics that fit your body perfectly and allow air to enter. It is very easy to choose from our sports and plain undershirts that suit your mood and desire.