Will Rainbow Mulch get hot in the sun?

Rainbow Mulch does not get any hotter than most other materials outdoors during intense heat. It is closed cell sponge rubber mulch - its surface is jagged and pitted, creating pockets of shade. 

Closed-cell sponge rubber maintains its properties over a wide range of temperatures. It can withstand high temperatures without losing its flexibility. It is resistant to chemicals, oils, and solvents and performs well in harsh environments.