Should I wear swim trunks or jammers?
Both trunks and jammers present a good option for amateur and seasoned swimmers. Trunks are typically for less competitive swimming or can be used as drag shorts to increase resistance in the water for a harder workout. Jammers offer more coverage than trunks and provide a competitive option for performance athletes thanks to their close-fitting design and low-friction material; this is why you’ll see most athletes in either briefs or jammers as opposed to trunks. If you're all about the aero gains, then hydrodynamic swim skins provide a good option for non-wetsuit legal swims, offering 2-3sec per 100m time savings.