The present invention provides a method for forming a naked collation package comprising a) providing an arrangement of packages individually wrapped in a filmic material; b) providing a naked collation film for nakedly wrapping said individually wrapped packages, the naked collation film comprising a polyolefinic core layer C, an inner sealing layer A on the inner surface of the naked collation film and a polyolefinic outer sealing layer B on the outer surface of the naked collation film, the material of the inner sealing layer A being selected for sealing incompatibility with the filmic material of the individually wrapped packages under a specified sealing condition and heat shrinking condition, and the polyolefinic material of the outer sealing layer B being selected for sealing compatibility with B and for sealing compatibility with A under the specified sealing condition, wherein layers A and B are formed of the same or different materials and layer B comprises at least one polyolefinic polymer and a slip promotion component comprising less than 0.2% by weight of the layer of silicone and a non-silicone component in an amount exceeding 0.1 % by weight of the layer; c) arranging the individually wrapped packages in an ordered configuration; d) arranging the naked collation film such that it at least partially surrounds, although is not necessarily in contact with, the ordered configuration of individually wrapped packages; and e) heat shrinking the naked collation film by exposing if to the heat shrinking condition, causing the naked collation film to shrink and closely surround the arrangement of packages, without being sealed to the packages. Naked collation film wrapped packages are also disclosed.