Swedish designer Pia Wallén’s iconic Slip In slippers, created in 1992 for Cappellini’s Progetto Oggetto collection, transform traditional Scandinavian felt-lined boot concepts into contemporary design statements. These unisex slippers embody Wallén’s core principles of functionality, simplicity, and comfort, utilizing premium felt materials and minimalist aesthetics to create timeless footwear that bridges Nordic heritage with modern lifestyle needs.