Non adhesive conveens with a little velcro tie wrap. Dont laugh - Ive been using that for over 30 years with no inflight mishaps - and I re-use the conveens many times. Rinse, hang to dry, dust inside and out with a very small amount of talc and roll up over a tube sized to give just a little stretch. A box of 30 lasts about a decade (I'm on my third). Too much information??