That`s a great analogy Hersute.... the lace `behaves` similarly to nylon tights against the skin.
To Elvis : All lace systems come with `spare`/extra lace about 1/4 of an inch in width all the way around....the wearer trims it off with scissors. Some leave a millimeter or two in front of the hair , some trim right back to where the hair `begins`..... so `how far down on the forehead it goes` is down to how you trim it yourself...... I always go back to the hair but that`s just me ...the possible problem with `keeping`some extra lace is that dust/dirt can become stuck/collect on the underlying adhesive/tape and lead to a visibility issue. Regards,Paul.