FC Barcelona have reportedly complained to Nike that the new Dri-FIT shirts are weighing down their player. The threads were even weighed during halftime, and the kit more than doubled in weight within 45 minutes of sweat. That means a shirt that weighs seven ounces to start a match balloons up to as much as 16 ounces at halftime.

Each of these special "pitch" shirts uses as many as a dozen recycled plastic water bottles in each shirt combined with Nike's uniquely designed Dri-FIT material. The product aims to "wick" away sweat from the body, keeping wearers dry. Nike says it will conduct tests on the iconic claret-and-blue striped shirts and see if they can fix the problem. The company has said that despite Manchester United, Arsenal and Inter Milan all donning the same product, Barcelona's team is the only one complaining.