So this jacket I have mixed feelings on BUT because I got it while the 50% off deal was active , I got what I paid for 😅. Slim / athletic build , 5’7 n a half , 175 lb . So I usually wear a size M but based off past purchases on FN website , I decided to size down & got a S. It fits snug w enough space to where it’s not fit like a glove but can still feel space in between fabric & skin (I also tried on while I had a generic sweatshirt on). If that makes sense . I could have gotten a L for a more oversized look but as I stated in other reviews with this size , it still fits so I’m happy about that. (Although the cuffs were a bit tight lol but I’m sure with each wear , it’ll loosed up). The material for the actual jacket part (excluding the arms) it was a bit thinner than I thought it would be but it’s still durable. But the ARMS are thick like I like it & just wish the whole jacket was of the same thickness 😅 but OVERALL , I’m still satisfied with the product , especially for the price I got it for. It’s cute , sporty like , & I love the color way. 😍