Sideburns are not self adhesive.
Apply with one of the following options:
Spirit Gum & Remover: most common adhesive for lace hair pieces such as moustaches and beards. Available in a convenient adhesive and remover pack. Has a long lasting hold and is sweat resistant. Needs a remover to take off.
Double Sided Tape: quick and easy to apply and remove. Excess sweating or consumption of alcohol may affect the adhesion. Does not need a remover to take off.
Telesis: products like Silicone Matte Lace Adhesive or Sigma Bond are usually only for professional film or theatre productions. Must have Telesis remover to take off.