Klim® - The Layering Company. Klim® engineers a complete array of layering solutions for every possible outdoor condition, specifically designed for the rigors of powered and unpowered outdoor activities. Conquer Any Climate - Klim Synthetic Base Layers. The ultimate riding experience is now possible when you are intelligently dressed with Klim® "Engineered For Powersports" base layer systems. Redesigned from the ground up, the Aggressor Series provides the most versatile and comfortable layering system available. When combined with Klim® mid-layers and outerwear systems, you will conquer any climate on planet Earth. Designed for high intensity output. Athletic fit. Aggressor 1.0 (Warm). Smooth next-to-skin finish maximizes moisture pickup and transmission. Low-profile for excellent minimum-bulk layering. Engineered specifically for the abuse of powersports.