New York art collective MSCHF's red rubber Astro Boy boots, as worn by US rapper Lil Wayne, right, have caused a stir in fashion circles. Photos: Instagram / @craftybjoern; Twitter / @Saint
New York art collective MSCHF's red rubber Astro Boy boots, as worn by US rapper Lil Wayne, right, have caused a stir in fashion circles. Photos: Instagram / @craftybjoern; Twitter / @Saint

What are the big red Astro Boy-inspired boots that are all over social media?