Garment (1, 1'), in particular jacket or trousers, in particular motorcycle jacket for motorcyclists, comprising a) a chamber (4, 4') for receiving a part of the body (2, 2') of a wearer of the garment (1, 1'), in particular a leg or upper body, b) an upper material (3, 3') which encloses the outer periphery of the chamber (4, 4'), and c) a substantially breathable, windproof and waterproof membrane (5, 6, 5', 6'), c1) arranged on the inside of the upper material (3, 3'), c2) secured to the inside of the upper material (3, 3') with a fixed membrane portion (5, 5'), c3) extending over a portion of the periphery of the chamber (4, 4') with the fixed membrane portion (5, 5'); and c4) which is not attached to the upper material (3, 3') with a loose membrane portion (6, 6'), c5) wherein the loose membrane portion (6, 6') is adjustable between a rain position and a ventilation position, c6) wherein the loose membrane portion (6, 6'), when in the rain position, is resting on the inner side of the upper material (3, 3'), so that the chamber (4, 4') is surrounded by the membrane (5, 6, 5', 6') over its entire circumference, c7) whereas the loose membrane portion (6, 6'), when in the ventilation position, is located on the inside of the fixed membrane portion (5, 5'), so that the chamber (4, 4') is surrounded by the membrane (5, 6, 5', 6') only on a portion of its circumference, characterised in that d) the loose membrane portion (6, 6') is surface-coated with an air-permeable spacer (10, 10') on the side facing away from the fixed membrane portion (5, 5'), and e) the air-permeable spacer (10, 10') in the ventilation position of the loose membrane portion (6, 6') allows air flow between the body part (2, 2') and the loose membrane portion (6, 6'). a) a chamber (4, 4') for receiving a part of the body (2, 2') of a wearer of the garment (1, 1'), in particular a leg or upper body, b) an upper material (3, 3') which encloses the outer periphery of the chamber (4, 4'), and c) a substantially breathable, windproof and waterproof membrane (5, 6, 5', 6'), c1) arranged on the inside of the upper material (3, 3'), c2) secured to the inside of the upper material (3, 3') with a fixed membrane portion (5, 5'), c3) extending over a portion of the periphery of the chamber (4, 4') with the fixed membrane portion (5, 5'); and c4) which is not attached to the upper material (3, 3') with a loose membrane portion (6, 6'), c5) wherein the loose membrane portion (6, 6') is adjustable between a rain position and a ventilation position, c6) wherein the loose membrane portion (6, 6'), when in the rain position, is resting on the inner side of the upper material (3, 3'), so that the chamber (4, 4') is surrounded by the membrane (5, 6, 5', 6') over its entire circumference, c7) whereas the loose membrane portion (6, 6'), when in the ventilation position, is located on the inside of the fixed membrane portion (5, 5'), so that the chamber (4, 4') is surrounded by the membrane (5, 6, 5', 6') only on a portion of its circumference, characterised in that c1) arranged on the inside of the upper material (3, 3'), c2) secured to the inside of the upper material (3, 3') with a fixed membrane portion (5, 5'), c3) extending over a portion of the periphery of the chamber (4, 4') with the fixed membrane portion (5, 5'); and c4) which is not attached to the upper material (3, 3') with a loose membrane portion (6, 6'), c5) wherein the loose membrane portion (6, 6') is adjustable between a rain position and a ventilation position, c6) wherein the loose membrane portion (6, 6'), when in the rain position, is resting on the inner side of the upper material (3, 3'), so that the chamber (4, 4') is surrounded by the membrane (5, 6, 5', 6') over its entire circumference, c7) whereas the loose membrane portion (6, 6'), when in the ventilation position, is located on the inside of the fixed membrane portion (5, 5'), so that the chamber (4, 4') is surrounded by the membrane (5, 6, 5', 6') only on a portion of its circumference, characterised in that d) the loose membrane portion (6, 6') is surface-coated with an air-permeable spacer (10, 10') on the side facing away from the fixed membrane portion (5, 5'), and e) the air-permeable spacer (10, 10') in the ventilation position of the loose membrane portion (6, 6') allows air flow between the body part (2, 2') and the loose membrane portion (6, 6').