Husky 7.5 ft. x 17 ft. Diamond Grey Universal Flooring HK70DT717SGRHD - The Home Depot
Michelin Universal Fit Floor Mat Set – 4-piece | Costco
Better Life Technology Garage Floor Covering and Protector – CostcoChaser
Costco (in Canada at least) has these sweet rubber mats that remind me of the gym. Way cheaper than Amazon since they are heavy as heck! It's flat on the other side :
G-Floor 8.5' x 22' Coin Pattern Garage and Universal Flooring Cover & Under Car Mat - Slate Grey - Walmart.com
Thomasville Timeless Classic Area Rug or Runner Collection, Willington Black | Costco