EM ceramics are said to have a positive effect on the immune system and an effect against ticks and parasites. However, this effect has unfortunately not been proven. The paracord jewelry band with EM ceramic beads is available in these sizes: – 20-30 cm neck circumference – 30-40 cm neck circumference – 40-50 cm neck circumference – 50-60 cm neck circumference Pattern: Fall Foliage Closure: Sliding closure No leash should be attached to jewelry bands! To allow the EM ceramic beads to fully develop their effect, they should be worn for 24 hours. Once a week, they should be wetted, dried in the sun, and thus "recharged." This product is handmade. There may be slight variations in shape and color.