A unisuit, also referred to as a one-piece, all-in-one or zootsuit is a body suit used by rowers. A unisuit comes in many different colours and reflects the development of rowing

Rowing (sport)

Rowing is a sport in which athletes race against each other on rivers, on lakes or on the ocean, depending upon the type of race and the discipline. The boats are propelled by the reaction forces on the oar blades as they are pushed against the water...

 clothing from the earlier singlet and shorts

Shorts

Shorts are a bifurcated garment worn by both men and women over their pelvic area, circling the waist, and covering the upper part of the legs, sometimes extending down to or even below the knee, but not covering the entire length of the leg. They are called "shorts" because they are a shortened...

in club colours and patterns to a cotton lycra 'one-piece'. A unisuit suit allows a rower to move freely with out the possibility of catching oars on their clothing.