A portable splint assembly for fixation to a limb. The splint assembly comprises at least one elongated member having first and second fee ends; and at least one fastener which enables fastening of the splint to a limb. The at least one elongated member has a long axis along its longitudinal extent extending between the free ends and at least one transverse shorter axis. The elongated member is resiliently deformable to allow folding and/or or rolling about at least one said axes. The least one elongated member moves between a first state in which the elongated member is completely folded and/or rolled up and a second state in which the at least one elongated member is unfolded and/or unrolled to enable working engagement with a limb.