Sidas Run Feel socks are designed for road running. The 2 anti-slip grip strips will reduce movement in your shoe and thus reduce friction, blisters and unwanted movement. They will be perfect for road running and will improve the synergy with your insoles. The thinness of the socks will give you a better feel for the ground. The grip strips are there to maximise contact with your insoles. The ventilation zones on the arch of the foot allow perspiration to evacuate as best as possible, which is essential during Ultra Trail. The sock fibres use Skinlife technology for odour management.Features:- Reflective band- Ankle support- Finely crafted on a 200-needle machine- 3 grip areas for contact- Odor control Polygiene : odour management- Ventilated knitted area allows moisture to escape- Materials: 70% polyamide, 23% Skinlife polyamide, 3% silicone, 3% elastane and 1% glass beads- Washing instructions: turn inside out before washing.