Sea to Summit Foam Core Large Pillow Aqua Sea. This up-cycled foam is firmly packed inside a luxuriously soft and stretchy 50D knit fabric providing optimum comfort. An additional polyester fiber layer between the foam and pillow case offers cushioning and wicks moisture. Specifications for Sea to Summit FoamCore Pillow: Manufacturer: Sea to Summit Application: Camping Width: 5.1 in Fabric/Material: 50D Polyester Insulation: Synthetic Package Contents: Sea to Summit FoamCore Pillow Sea to Summit 045404: Foam Core Large Pillow Aqua Sea