Jack Adams Air Train Trunk designed with a horizontal fly for quick access with nature calls and a contoured pouch to nestle the boys for support. The fabric is micro Lenzing Modal that offers the finest comfort, breathability and hugging form. Made of 95% Lenzing Micro Modal and 5% Elastane Black, Medium. Chest: 38â  -40â  . Neck: 15â  -15.5â  . Waist: 30â  -32â  .