First item: Thin fabric, but not see-through. Size L, long sleeves, short length, wide neckline, stretchy fabric. A little roomy on me, I'm 154cm and weigh in the early 40kg range. Second item: Thin fabric, see-through. Size M, long sleeves, short length, narrow neckline, stretchy fabric. Fits perfectly on me, I'm 154cm and weigh in the early 40kg range. I've worn them about once since I bought them. ⚠︎︎ I have a cat. I'll use a lint roller, but please refrain from purchasing if you have severe allergies.