Outer shell breathable Lycra mesh panels (80% nylon, 20% elasthane) Lining 3D air mesh panels (100% polyester) in back to promote air circulation hypoallergenic sweat-wicking mesh covering Fit/features anatomically shaped, flexible back protection body-hugging waist belt with wide Velcro closure V-shaped design for excellent shoulder protection coccyx protector removable protector washable Protection SAS-TEC brest protection SAS-TEC coccyx protection SAS-TEC back protector rib protector made in special foam Sizes S (64x33) M (64x33) L (69x34) XL (69x34) XXL (76x35)