The invention discloses a comfortable restraint system located in a vehicle incorporating an electronic braking system governed by a control unit, and including a safety belt configured by a textile strap and a chamber attached longitudinally on each side of the textile strap, and also including a permanent anchoring device which in turn includes means for the coupling of an anchor tongue and a number of connector outlets for the supply and extraction of compressed air via a compression system, the chambers being connected to the connector outlets by means of adaptors, in such a way that they connect pneumatically to the compression system, which is governed by the vehicle control unit.