How do I know which size rucksack is best for me? Christopher March 25, 2016 17:15 Updated Follow Check out Sizing Rucks Explained and visit the size tab on each individual gear page. Related articles I wanna train to ruck, what’s the deal? How much weight do I need to carry for my Challenge? Is insurance mandatory? Can I bring Food or Alcohol? Comments 0 comments Article is closed for comments.