You should choose a punch bag based on the kind of boxing you do and how often you train.
There are two criteria to consider: size and material.
The type of boxing will determine the size of your punch bag (from 80 cm to 120 cm).
If you are a novice boxer and train only occasionally, choose a fabric bag that will be supple when struck.
If you are an advanced boxer and train more regularly (twice weekly), opt for a bag with a synthetic outer, such as in polyurethane that is stiff and very durable.
If you are an expert boxer or compete and train intensively (three or more times weekly), choose a sturdy bag in genuine leather that will withstand abrasion and punching.
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