Probably one of the most popular underwear brands in the world today, Calvin Klein is offered to you for a limited time only at 25% off at International Jock. In this semi annual sale by the leading men’s underwear and swimwear store in the USA you will find a huge range of designs and colours to choose from. The only problem is it won’t last very long so you’d better hurry! Find below a small selection of our favourite Calvin Klein designs on offer but do visit the section of the brand at International Jock here to see all the items.