DetailsZone3 Wetsuit Size Chart The Zone3 Swim Brief Shorts were designed to stand up to the demands and rigours of training day-in, day-out. Made from XFINITY fabric which is 100% chlorine proof for longer-lasting performance and superior fit. This style of swim short provides the perfect balance between a brief and a jammer. The collection is made from a combination of fabrics to ensure low water retention, durability and coverage. The Brief Short offer more upper-leg coverage than a traditional brief, while allowing the same freedom of movement in the water. A high-quality elasticated waistband and discrete overlock seams provide great shape with a seamless appearance. A thin inner drawstring waist cord makes sure of a secure fit.