The question was:
I have been trying out the new 1000-mile, double layer, Fusion socks. They have a full length achilles tendon padding, arch bracing, extra padding at toe and heels and a Tactel inner layer which wicks away perspiration. In spite of all that, they are actually very thin. The most impressive part is the blister free guarantee. Money back or replacement if, within one year from date of purchase, you either experience blisters or the socks wear out within 1000 miles of use provided care instructions have been followed. Anyone want to try them out on a 1600km walk and let me know if they fulfill their promise?
Read all the Camino de Santiago Socks advice in the forum.