Examples of a breast support garment are disclosed. The breast support garment comprises a front panel with a chest area configured to support a wearer's breasts and dampen an accelerating movement of the breast tissue, and a hydration system that comprises a hydration reservoir and a dispensing tube connected to the reservoir. The breast support garment further comprises a holder that is dimensioned to receive the reservoir of the hydration system and one or more guides to support the dispensing tube. The breast support garment of the present invention integrates the functions of a high support sports bra and a hydration vest or backpack.