Abstract: The shoe sole comprises a flexible chamber therein with an inlet and an outlet. The shoe sole also comprises an inlet valve assigned to the inlet, and an outlet valve assigned to the outlet. The flexible chamber is arranged in the front region of the shoe sole, where an air inlet space is provided. The air inlet space is connected by the inlet valve to the chamber which is open to the environment via openings in the insole. The chamber is connected by the outlet valve to the outlet on the outer face of the shoe sole outside the insole. The chamber is filled almost completely with an elastically deformable material which absorbs air during its elastic expansion and releases air that has been previously absorbed during its compression. In this way, an air circulation that feels comfortable to the foot can be achieved in the shoe having this sole.

Abstract: The shoe sole (1) comprises a flexible chamber (6) arranged therein, with at least one inlet (5) and at least one outlet (9). The shoe sole (I) also comprises an inlet valve (15) assigned to the inlet (5), and an outlet valve (19) assigned to the outlet (9), wherein the flexible chamber (6) is arranged in the front region of the shoe sole (1), where an air inlet space (4) of the shoe sole (1) is also provided. The air inlet space (4) is connected by the inlet valve to the chamber (6) which is open to the environment via openings (2) in the insole (3). Moreover, the chamber (6) is corrected by the outlet valve to the outlet (9) on the outer face of the shoe sole (1) outside the insole (3). The chamber (6) is tilled almost completely with an elastically deformable material (16), which is such that, during its elastic expansion, it absorbs air and, during its compression, it releases air that has previously been absorbed.

Abstract: Described is a method of organizing travel between a plurality of travelers by allowing a first traveler to specify criteria and preferences for a trip, finding a plurality of destinations which match the criteria and preferences, then allowing the travelers to rank and vote for each destination. Once one traveler selects a trip based on the ranking, the traveler may invite the other travelers to join them on the trip.