General insulation for walls or roofs can come in a variety of formats…

Loose Fill is made up of polystyrene beads or cellulose fibre and can be poured into spaces such as cavities.

Bat insulation is a semi-rigid insulation board often made up from compressed cellulose fibre, mineral wool or glass fibre.

Blanket insulation is very common and is, for example, used around hot water tanks. It is basically a mineral / glass fibre quilt.