I am not sure if they actually make you sweat more, but they do not absorb the sweat so you feel more wet, as if you sweated more. Depending on the fabric structure, the sweat not being able to evaporate will increase your skin temperature causing increased sweating. read more
Depending on the fabric structure, the sweat not being able to evaporate will increase your skin temperature causing increased sweating. Natural fibers can transport the moisture through them to the outside; synthetics can be treated to transport the moisture on their surface, depending on several factors. read more