The best use and throw underwear for men in the single-use travel category is functional, comfortable enough for a day's wear, and lightweight enough not to add meaningless weight to a carry-on. Those are the right criteria for a product designed for a specific practical purpose. But the more I think about use and throw underwear for men, the more I come back to the same conclusion: the best version of this product is the one you use as a last resort while your quality everyday gear handles the regular rotation.
What I think blokes who rely on use and throw underwear for men for regular travel might be missing is that quality underwear washes and dries fast enough to handle most travel scenarios without needing the disposable category at all. A quality pair of Barramundies trunks washes quickly, dries overnight in most conditions, and holds up to the travel use cycle without degrading. That makes the use and throw category largely redundant for anyone who's invested in quality everyday gear.
I tested this directly on a 5-day trip. I packed 3 pairs of Barramundies and used hotel laundry facilities on day 3. The pairs dried completely overnight and I had clean gear for the remaining days without packing use and throw underwear for men at all. The quality held up through the travel washing conditions, which is exactly the point. Good everyday gear handles most situations that use and throw gear is bought to solve.
From my experience, the best use and throw underwear for men is quality everyday underwear applied broadly enough that you rarely need the single-use alternative. Barramundies makes gear that travels well, washes fast, and holds up to the rougher handling of travel use. Buy quality, pack light, and leave the disposables for genuine emergencies. That's the smarter approach.