I have this Kindfolk backpack and it perfectly fits my two blocks, water bottle, towels, and wallet along with my mat. I have a pretty heavy Manduka mat so this bag is great because the weight is balanced while I'm going to and from class, unlike the some of the sling or duffle bag style ones that torque my back. https://www.amazon.com/Kindfolk-Backpack-Straps-Patterned-Celestial/dp/B06XXPF169?ref_=ast_sto_dp&th=1&psc=1