Blackspade Level 2, Active thermal products are of medium thickness, with a body-hugging and stretchy fabric. Suitable for indoor and outdoor use in the winter season, and in cool and cold environments. You can choose them for everyday use or various outdoor activities. Viscose fiber is a natural fiber produced from cellulose. Thanks to the special production and special section viscose fibers in Blackspade Thermal products, thermal insulation and moisture-wicking are high. Additionally, thanks to these special fibers, the products gain a natural softness. They have much higher thermal insulation compared to cotton products.