improved compositions for tissue augmentation are provided . these compositions comprise an amount of crosslinked material sufficient to provide a melt temperature greater than 37c , wherein microparticles can be substantially uniformly dispersed and maintained at ambient room temperature as well as body temperature . said compositions also provide high shear moduli , sufficient to effectively deliver microparticles into dense tissue and narrow intersticial spaces without significant disruption to the homogeneous distribution of microparticles within the solution . the provided compositions can be stored and shipped at room temperature without significant detriment to the material composition . additional embodiments include a system for delivery of tissue augmentation materials and methods of manufacture thereof .