Irwin, famously known as Ai Wen, has smooth eye-catching dark red blush skin at maturity. It is especially popular with Asians for its fiber-less flesh and sweet pleasant aroma, and is prized in Taiwan for its superior appearance and sweetness.

Irwin fruit is of ovate shape, with a rounded base and a pointed apex, lacking a beak. The smooth skin develops an eye-catching dark red blush at maturity. The flesh is yellow and has a mild but sweet flavour and a pleasant aroma. It is fiber-less and contains a mono-embryonic seed.