Flannel on one side, organic flat cotton on the other side.

Top layer: Boostable stretch wing liner with flannel top and organic cotton fleece core

Middle layer: Trifold absorbent booster with flannel top and organic cotton fleece core

Bottom layer: Bow Tie with flat cotton top, soft structure Tyvek inside and flannel back

Combine the stretch wing liner with any one of these three long boosters.