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 Royal, Large. Chest: 41â  -43â  . Neck: 16â  -16.5â  . Waist: 33â  -35â  .