The T-shirt is ideally suited for pain in your shoulder, neck and spine.This garment is not the preferred choice for lower back pain however. Due to the concave curvature of the lumbar region, the fabric does not come into close enough contact with your lower back unless you are seated or lying down. Though many people choose to sleep in their T-shirt, and have thereby achieved extremely worthwhile results, the recommended product for lower back pain is certainly the back brace. Our mattress overlay has also proven very beneficial in relieving back pain, and is yet another effective alternative.Colors: Black or WhiteSizes: S, M, L, XL, XXL, & XXXLSizes: (unisex sized) XS5'3 /Chest 33 / Neck 13 - 16Small5'5 /Chest 35 / Neck 14 - 17Medium5'7 /Chest 37 / Neck 15 - 18Large5'9 /Chest 39 / Neck 16 - 19XL5'11 /Chest 41 / Neck 16 - 20XXL6'1 /Chest 43 / Neck 17 - 21XXXL6'4 /Chest 47 / Neck 18 - 22Material: 50% cotton / 50% polyester with ceramic textile.Care: Machine washable up to 86F or 30C. Use normal detergents that do not contain bleach or fabric softeners. Air dry only, do not tumble dry.