system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do rock climbers carry enough gear and supplies with them to sleep/ eat/ drink while on a face for several days?
gpt
Climbers try to load up their bodies with fats & water before the climb. During the climb they'll eat mainly high-density proteins and carbs/sugars (rations, beef jerky, trail mix, dehydrated fruit). Climbers carry backpacks, and for anything bigger they'll use cylindrical haul bags which they leave behind resting on a ledge and when they reach the next ledge they use the attached rope to pull it up.