BOSI: How a humble nerd became the worlds strongest climber @EmilAbrahamsson

BOSI: How a humble nerd became the worlds strongest climber @EmilAbrahamsson

Uploaded January 2026 | Updated September 2026, 4 days ago

Today I'm joined by living legend @WilliamBosi to see what it is that makes him such an incredible boulderer.

My gear:
Favorite shoes
MadRock Drone madrock.com/collections/shoes/products/dronehv
MadRock Drone CS madrock.com/collections/shoes/products/drone-cs-hv

Instagram:
instagram.com/emil_abrahamsson_
instagram.com/will_bosi
instagram.com/teresa_coimbra_climbs

Filmed and edited by Johan Nilsson

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Emil Abrahamsson |

BOSI: How a humble nerd became the world's strongest climber