I ordered two of these sweatshirts here on Amazon and was pleasantly surprised by the quality for the price (about EUR 20): the shirts are well made, the material is relatively thin and breathable enough. Worn over the T-shirt has an ideal temperature regulation by the zipper all day long. The sweatshirts have a small pack size and are relatively easy. Often I take with me in the summer one, if it can be a bit cooler at night. Because of the smooth surface own the shirts also ideal for the popular among athletes onion principle to bear in the winter under a coarse, warm wool sweater - on and off the sweaters goes so simply quicker of hand. All in all I would recommend these lightweight jackets' Charles Sweat Core "each. The model "Abel Sweat Core" from the same manufacturer, however, made no good impression on me.