Polyester shell gloves are a solid choice for most casual resort skiers. They're lightweight, handle varied conditions well, and typically cost less than nylon or leather options. If you're skiing mostly groomed runs and not dragging your hands across rocks or trees, polyester holds up just fine for everyday use.
The main trade-off is durability—polyester isn't as abrasion-resistant as nylon, so it may show wear faster if you're hard on your gear. It also won't match the premium grip and dexterity of leather, which molds to your hand over time.
That said, polyester offers good water resistance and retains its color well season after season. For budget-conscious skiers or those who replace gloves every couple of seasons anyway, polyester delivers reliable performance without the premium price tag. Just skip it if you're skiing tight trees, doing lots of rope tows, or heading into the backcountry where tougher materials pay off.