Black - red, but different...no rubbing, pressing, scratching or unpleasant sweating – just perfect comfort in any position guaranteed!the Inner surface is upholstered and made of breathable and water-repellent functional fabric. the use of genuine leather ensures a high durability.our high-quality closures allow easy opening and closing and guarantee a firm hold in any position. for each restraint there is a matching carabiner ring. functional and elegant at the same time. our restraints are 5cm wide, only 7mm high and do not overlap. it can get wilder - no problem, our restraints can withstand a pulling force of up to 180kg. mediuml - optimal for an ankle joint circumference of 21-23 cm