The classic TNF base camp duffel bag. I believe the small is 50L per their website.
Don't forget to stack with:
Cashrewards $5 Bonus Cashback on $50 Spend (remember to activate) and
Cashrewards 15% upsized cashback on Luggage category today 9/10/24 ($25 cap).
A number of other sizes also available:
Black:
XL: $149.99
XXL: $179.99
And other colours at different prices.