Kill the chill during water activities without weighing you down in the water. Fleece fabric lining for the body, sleeves are polyester for flexibility. Wind and water resistant. UPF 50. Fit should be nice and snug to keep water from flowing into the shirt. Fabric s/b lightly stretched & pulled snug for a taut fit. Lasts against chlorine. Approx. sleeve from neckline 28.5 “, pit to pit 21”, back length 24”, front length 21.25”, bottom is 19.5” wide. Only worn 4 times, like new.