BININBOX Men's Sharkskin Swimming Jammer Trunk Racing Training Swimwear Fina Approved PLEASE NOTE: A tightly fitting swimwear, or 'compression', is a key characteristic of competition swimwear. Recommend to select next larger size if you aren't professional swimmer or you are near the border between two sizes. 100% Brand new and high quality. Competition standard. It is light in water and quick drying. Water flowing is rectified and friction drag can be reduced. The fabric compresses the body to stop skin vibration and muscle oscillation to save energy and reduce drag. It is meant for competition and racing swimming and therefore you should expect a very tight fitting swimming trunks and no more baggy legs as often found in the major brands.