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 :
Revêtements pour le plancher du garage : lequel choisir? | RONA
Traction Rubber Flooring at Costco - YouTube
Garage Flooring | Costco
Garage Flooring | Costco
GorillaCOR™ - Rolls | Perfect Surfaces Shop
AutoFloorGuard 7.9'x18' Mid-Size Vehicle Containment Mat | Costco
Offre Tapis De Jeu Réversible - Eckhert chez Costco