Care should be taken when choosing men's underwear that is in contact with the skin throughout the day. Products such as men's undershirts, tracksuits, men's underpants, men's bodysuits, men's boxer briefs, men's long boxers, men's slips, men's pajamas, men's dressing gowns, men's socks, men's sports socks are very important for health. According to research, tight men's underwear that is not suitable for anatomy negatively affect sperm count. Narrow and non-breathable men's boxer, men's long boxer briefs or men's slip products cause bacteria formation and, accordingly, when worn for long hours. Men's underwear products that affect sperm quality and number should therefore be chosen from breathable and sweat-absorbing fabrics suitable for the male anatomy.