SKINS Men's Size Chart SKINS DNAmic BASE Long Sleeve Top is a light compression base layer to help you power through training sessions and game days in optimal comfort. By combining DNAmic Gradient Compression with a semi-seamless construction and superior moisture management, it fits under your gear like a second skin so you can work out, play or train without distraction. Features: - SKINS most advanced compression technology increases muscle oxygenation, stabilizes active muscles and reduces blood lactate build up, to enhance performance and speed up recovery time. - Unique sizing system based on SKINS' unique Body Mass Index (BMI)/anthropometrical algorithm, so you get the full benefits of gradient compression - Moisture wicking fabric draws sweat away from the body to the surface of the garment where it evaporates to keep you dry. - Minimal seaming for extra comfort, ideal for layering