Base layers made with synthetic materials dry quickly, are stretchy for a more comfortable fit and are very durable. Due to their moisture-wicking properties, synthetic materials are excellent for high-intensity activities.
Thanks to their temperature-regulating properties, wool base layers are suitable for both warm and cold conditions. Therefore, they are also good for activities like downhill skiing, where the intensity varies between high on the slopes and low on the lift. Merino wool is often used in base layers as it is much softer and doesn't itch.
Base layers made with a mix of wool and synthetic materials combine the best of both worlds. Wool's natural antibacterial properties keep bad odors at bay, while synthetic materials make the garment durable and easier to care for and wash.