It is loosely based on the novel Hovno Hoří ("shit on fire") by Petr Šabach.

[3] Cosy Dens is a bittersweet coming-of-age story set in the months from Christmas 1967 up to the 1968 Prague Spring.

After a wedding that unites the families, the film ends with the news of the invasion of Czechoslovakia by Warsaw Pact troops.

The Czech title is a plural and diminutive of the word "pelech", literally meaning animal den or burrow.

[4] The soundtrack to Cosy Dens was released in April 1999 and contains snippets of dialogue in addition to songs.