Maru mens pro t jammer. Stating the obvious. These are designed to be tight. Like Compression. Think like a Second skin.
These FINA approved Jammers are designed for racing.
Made from high performing supportive fabric with a Teflon coating.  
These Jammers retain their shape and are quick drying.

•Manufactured using the latest Xtra life Lycra with Teflon coating
•Advanced material to provide increased energy and stability
•Quick drying
•50% thinner than traditional swimwear fabric
•Silicone gripper on legs for fit and comfort
•Moulds to the body allowing the optimum freedom of movement
•Excellent UV protection
•Optimal muscular compression, reducing lactic acid formation