For optimal performance during swimming, your wetsuit should fit comfortably without hindering your movements. Wearing a wetsuit that is too tight can lead to shoulder fatigue, while one that is too loose can fill with water. When putting on a wetsuit, it should fit snugly but not uncomfortably. If you experience choking or difficulty raising your arms, the wetsuit is likely too small. Keep in mind that the wetsuit will loosen a bit once you enter the water. To make final adjustments, allow a little water to enter through the neck area, and then work the suit up into the crotch area for a snug fit. Push the sleeves up slightly to relieve pressure on the shoulder area.