Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Bag-20 For PRS-21

I bought this bag to keep a PRS-21 free of dust and garage moisture and to prevent it from getting dinged or scratched during transport. The PRS-21 fit perfectly into the Bag-20 provided you fully collapse the upright tube. The bag material feels like MTB shorts, not heavy duty cordura (hence the 4 star rating), so I'm not sure how well it will stand up to heavy use or abuse. Overall, I would recommend this product to anyone who wants a matching Park Tool bag for their Park Tool repair stand.