On a hot summer day a metal slide and a wooden bench can both be at 50 °C (over 120 °F). The wood feels warm. The metal hurts. Same temperature, different speed.
At the extreme end: the Space Shuttle’s belly tiles were made mostly of air and silica fibres. They were so bad at moving heat that a technician could pick one up by its edges seconds after it left an oven at over 1200 °C, while its middle still glowed. The tile wasn’t cool. Being mostly air, it held very little heat, and it couldn’t pass that heat to a hand fast enough to hurt. Same trick as the wooden plate, pushed to the limit.
Please don’t try this one: hot metal in the sun can burn, and the shuttle tile demonstration used special silica material handled by trained staff.
Simplified on purpose: the tile is drawn as a plain block; the real belly tiles had a black glassy coating over the white silica.
Sources: Purdue University chemistry demonstration 13.4, the Space Shuttle tile; Space Shuttle thermal protection system (LI-900 tiles); OpenStax University Physics Volume 2 (Mechanisms of Heat Transfer).
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