- Neoprene free
- Outer contains 78% recycled Nylon
- Lightweight
- Wind and waterproof fabric
- Breathable
- Neutrally buoyant
- Machine washable
- Equivalent of 2mm neoprene

The Fourth Element Thermocline Socks are a fantastic alternative to neoprene socks. With flat lock stitching and fleece lined fabric, they are ideal under neoprene boots.