Our Signature Titan Thread makes the sock 100x stronger while still feeling silky smooth. Titan Thread is 15x stronger than steel – so strong, you can lift a 20lb dumbbell with just one strand. Silicone Heel Webbing is specifically designed to cradle your foot and keep your sock firmly anchored to your heel. No more slipping socks down your heel. Blocks 99.95% of odor causing bacteria – using Silver Ionized Antimicrobial Threads – minimizing foot odor.