Patent ID: 6892396

Claim:
An undershirt worn in a state of being substantially in close contact with a surface of an upper body of a wearer, the undershirt comprising a main constituent portion made of stretchable materials that include a first-type material, a second-type material, and a third-type material, the first-type material having a straining force greater than a straining force of the second-type material, and the second-type material having a straining force greater than a straining force of the third-type material, wherein the first-type material is arranged in regions such that in each region the material covers at least a part of musculus triceps brachii, the third-type material is arranged in regions such that in each region the material covers at least a part of a lateral portion of musculus trapezius, at least a part of a superior portion of musculus latissimus dorsi, and at least a part of a medial portion of musculus deltoideus in a vicinity of scapula, and the second-type material is arranged in regions other than the regions where the first-type and third-type materials are arranged.