Compression base layers are clothing garments, that provides additional support to muscle groups. This is especially useful for long periods of work. There is evidence that compression clothing may enhance athletic performance, and reduce the time taken for muscles to repair themselves. The main benefits of compression clothing are that it keeps the muscles warm and keeps sweat away from the body to prevent chafing and rashes. 98% Polyester 2% Elastane blend. Extremely comfortable with soft handle. Elastane content to retain shape and form. Ribbed ankles. Fully elasticated waist. Contrast stitching. Excellent for work, sport and outdoor activities.