AllerMates New Multi Allergy Bracelet Kit for Children Including Epi Pen Charm AllerMates New Multi-Charm allergy bracelets are now made of soft silicone allowing for a softer feel and easier use. Designed with a new adjustable snap feature with 3 slots allows this AllerMates allergy bracelet to fit the wrist size of most kids ages 3+. Measures 7&#034; in length. Made to fit up to six different AllerMates medical alert charms, each measuring 7/8&#034; high and 1.2&#034; wide. These allergy bracelets are 100% latex free..