The collection contains a data set of tweets collected from the Twitter microblogging and social networking service regarding the Movimiento San Isidro, a social and political movement created by a group of Cuban dissident artists protesting the country's Decree 349 that requires artists to obtain prior approval from the Ministry of Culture to perform in public and private spaces. The group protests police violence, with some members using non-violent methods of resistance such as hunger strikes to bring attention to their cause.

Beginning in November 2020, the Cuban Heritage Collection collected tweets relating to the following accounts, phrases and hashtags: @Mov_sanisidro, @LMOAlcantara, @MaykelOsorbo, @CubaCultura, #TodosSomosSanIsidro, #FreeDenis, #LiberenADenis, #LibertadParaDenis, #EstamosConectados, #FuerzaCuba, #SomosCuba, #CubaEsCultura, M-26-11 AND Cuba, #unidad AND Cuba, #Luisma AND Cuba, #CubaDeTodos, #TodosConSanIsidro, #NoALaViolenciaPolicial, #DondeestáLuisManuelOtero, and #CubaYChacón.

The tweets collected by the Cuban Heritage Collection for this data archive do not represent an exhaustive or complete record of all tweets relating to the targeted hashtags due to restrictions on tweet volume accessed via the Twitter API.