The airflow vents in these baskets keep musty smells away even when I leave damp towels in them for a bit. They're surprisingly sturdy for being flexible, and the three-pack is perfect for sorting lights and darks.
Got the three-pack so I could stop mixing towels with workout clothes, and sorting by color is finally effortless. The airflow design actually helps damp stuff dry instead of getting that musty smell. Sturdier than I expected for plastic, too.
Bought the 3-pack so my kids could each have their own hamper, and no more sorting battles on laundry day. The 40L size holds about a week of their clothes, and the flexible sides make them easy to carry down the stairs.