Good to the core, the S3 Solution Vest is TRUEWERK's most protective and flexible option for keeping you comfortable despite harsh elements, thanks to the channeled hex-fleece liner and completely windproof properties. Engineered for maximum versatility, this vest can be worn as a tough outer layer. Or, wear it as a mid-layer beneath a coat or rain shell. Features four-way stretch for ultimate mobility, a micro-ripstop outer shell for durability and abrasion resistance, and an industry-leading 10k/10k breathable waterproof laminate to keep moisture out while still allowing air in.