The hardest part is understanding differences between men’s and women’s sizing systems and how to interpret them realistically. Men’s models provide sizes L/XL/3XL with approximate weight limits as mentioned earlier. Women’s sizes follow a closer set of numbers similar to European sizing, like Medium and Very Large, depending on the specific model. To avoid confusion, measure your chest and waist circumference if possible, and follow the detailed description for the specific model you’re considering—since it explains the size, how it relates to fabric type, and the usage range.