During the summer months, exercising in the sun is so much fun for us, and many people are starting to realize that a quality base layer that regulates and lowers body temperature is truly essential. Zero fit summer collection We have a diverse lineup of products, including warp-knitted products with excellent perspiration treatment, and products with a cool touch function. A base layer that works up to 40 degrees to keep you comfortable no matter what sport or activity you're doing.