The short version
Black Diamond Wiz Kid is the adjustable youth climbing harness. We evaluated the size adjustment range and age longevity vs. fixed-size youth harnesses.
Who it's for
Buy this if: Parents outfitting children ages 4-10 for gym and outdoor climbing.
Skip this if: Adults — this is a youth-only harness.
In practice
Growth Chart Value
Fixed-size XS youth harness: grows out in 1-2 years. Wiz Kid: 50-130 lb range covers most children from age 4 to 10-12 depending on build. Parents who climb regularly can spread one $65 harness over 6-8 years before their child needs an adult-sized harness.
What we loved
+ One harness covers 6+ years of child growth+ UIAA certified at youth weight ratings+ Adjustable while wearing — no need to take off between sessions
What we'd change
– 50 lb minimum — not for toddlers– $65 vs. adult harness designs that some parents repurpose for older children
Where to buy
Check the current price
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