I was blown away to find that the only underwear I've ever LOVED was no more!
Following a link on another site I located
www.ergowear.com -- a Canadian company that offers a line of underwear called "X3D" that they describe as having a larger pouch for greater comfort. This underwear is made of Tactel microfibre.
I ordered a pair of briefs and, several weeks later, a registered letter arrived from Chile. In it was a pair of silky, rather sexy, bikini-style underpants. The legs are cut high so the seat, unlike e2u, is rather skimpy -- think "french cut" and you'll get the picture.
Tactel breathes -- I've worn the briefs all day long (in more than 90 degree F weather) and have felt cool and comfortable. Mr. Longfellow and his two friends fill the stretchy pouch without any feeling of restriction. The combination of Tactel and Lycra is VERY erection-friendly.
I've just ordered a 3-pack (on sale at a discount) of the X3D boxer -- it looks like a square-cut bathing suit, probably more of a boxer brief than a true boxer.
I think we may have found a winner here, ever if they CAN NOT be machine dried!