Our take

The reason umbrella shades win is not thermal performance, it is that they take about four seconds to deploy, and a shade you actually use every day beats a better one that stays folded in the boot. The trade is coverage: a round canopy against a rectangular windscreen leaves the corners exposed, so heat still gets in at the A-pillars in a way a fitted accordion shade prevents. Stowed, it takes up console or footwell space rather than lying flat against the glass. Straightforward pick if the last shade you owned went unused.

Best for: Drivers who abandoned a folding shade because it was too slow to fit