I was going to spend some time and effort explaining what goes into the cost of making quality boxer briefs for women but then found this awesome posting on The Lingerie Addicts page. We're not making lingerie exactly, but the same work goes into making really great boxer briefs for women. 'Nuf said.
http://www.thelingerieaddict.com/2012/05/why-do-lingerie-retailers-charge-the-prices-they-do.html
http://www.thelingerieaddict.com/2014/09/lingerie-expensive-part-1-fabrics-trims.html
http://www.thelingerieaddict.com/2014/10/lingerie-expensive-part-2-creation.html
http://www.thelingerieaddict.com/2014/11/lingerie-expensive-part-3-invisible-costs.html