Best Lightweight Summer Masks
These 15 Face Masks Are Lightweight, Breathable, and Easy to Wear
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These Hedley & Bennett The Wake Up & Fight Masks ($28 for 3) are no-nonsense masks that don't take up much space (easy to put in your pocket on a walk, for instance). They have a slot to put in a filter, and they're washable. Plus, they donate one for every mask purchased.