Lightweight and breathable. Good quality. I wear a XL or XXL (depends on who makes it) shirt and decided to buy the XL. Glad I did. It fits very well and the stitching has held up well despite having a few stray threads upon arrival. I snipped them but haven't seen any unraveling or anything like that. Most likely just a side effect of mass production.This jersey does have ripstop material along the shoulders and the "tops" of the arms running the length of the sleeves. The rest of the jersey is a lightweight breathable material similar to sports shirts and the like. Very comfortable even in 100 degree weather and even in 40 degree weather I was comfortable with an undershirt and baselayer.There is no padding (good thing for me) so if you are looking for extra protection keep looking. Overall for airsoft/paintball/costumewear/etc this is a great choice! I would not hesitate to recommend the Kilo line to anyone looking for lightweight and comfortable gear.