Castelli Short Distance Trisuit BlackThis Castelli Short Distance Zip Back Sleeveless Trisuit for men in black and white has been specially designed for sprints and short distance runs without a neoprene permit. Specially designed for short distance races without permission for the use of neoprene.This Castelli Short Distance Zip Back Sleeveless Trisuit for men in black and white has been specially designed for sprints and short distance runs without a neoprene permit.To achieve fast swim times, we have relied on a waterproof material and have completely dispensed with pockets.