Certain types of underwear can cause of chafing on the upper and inner thighs as well as around the groin and buttocks. Underwear that is too loose or too tight can also cause chafing as well as large seams and complicated designs.
Many manufacturers produce no chafe underwear that is specifically designed to prevent chafing. This can include using unisex thigh bands that can be worn with all types of men’s and women’s underwear.
Aside from specifically designed underwear, you can choose underwear fabrics that are designed not to cause friction against the skin and that reduce sweat. For men the best type of underwear style to prevent chafing is boxer briefs. These stay distant from the skin and have enough length to protect the inner thighs. Both men and women should choose anti-chafe underwear that is made from a moisture-wicking fabric which pulls wetness away from the skin so that it evaporates.