While leather duffels and weekenders are undeniably classic, there comes a point during the winter slog when the upkeep becomes a bit impractical amid the city’s slush, subway grime, and rain. Kenneth Cole’s new collection of bags, wallets, and boots is made of the ultimate no-fuss material: rubber. The duffel makes a low-maintenance winter bag for travel or the gym — sturdy, waterproof, stainproof, and easy to clean. (Now you won’t have that cringing reaction when your bag gets dragged across an airport carousel or locker-room floor.) Throughout the month of December, all proceeds from the collection benefit amfAR, the Foundation for AIDS Research.