two-layer
adjectiveUK /ˌtuː ˈleɪ.ər/
US /ˌtuː ˈleɪ.ɚ/
Something two-layer has two flat parts stacked on top of each other.
She baked a two-layer cake for the party.
OTHER MEANINGS
2. Made of two separate levels or tiers.
The two-layer bus has seats upstairs and downstairs.
3. Having two coats or coverings of a material.
The two-layer jacket keeps you warm in the rain.
4. Involving two distinct stages or parts.
The project uses a two-layer plan: first we draw, then we build.