No. They are flag-inspired designs using stars, stripes and the colour palette as design elements. Flag etiquette discourages using an actual flag as clothing, so the inspired treatment avoids that issue.

Lightweight and loose. Early July is the hottest stretch of the year in most places and the day is spent outside, so anything heavy becomes uncomfortable by early afternoon.

Usually yes. Temperatures drop after dark more than people expect, especially near water. A light garment plus a layer to add later beats one mid-weight piece.

Some. Ultraviolet light breaks down dye, so a piece worn to several summer events looks different by autumn. Washing inside out and drying in shade slows it noticeably.

Yes. This date is bought in quantity more often than most. Stadium giveaways covers ordering across a spread of sizes.

In the printed flags section, which covers display items sized and finished for outdoor use.

No. Memorial Day and Veterans Day are both noticeably more restrained, because they are commemorative rather than celebratory occasions.