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Sports & Outdoors

Waterproof Backpack 35L Roll Top Backpack with Airtight Zipper Pocket and Cushioned Padded Back Panel Dry Bag

Sports & Outdoors4.4· 235 Amazon ratings

Bias-adjusted across 235 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Sports & Outdoors.

66.2%
Percentile · Global
59.5%
Percentile · Cohort
Sports & Outdoors
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Waterproof Backpack 35L Roll Top Backpack with Airtight Zipper Pocket and Cushioned Padded Back Panel Dry Bag

How the score was built

Amazon ratings
235

used for the Bayesian percentile

Raw star average
4.4 / 5

unadjusted Amazon mean

Bayesian avg
4.37

raw rating shrunk to the category prior

Reviewer-graph z
0.707

bias-corrected vs. each reviewer's baseline (0 qualifying)

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Same category · Sports & Outdoors

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