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 thumb loop arm adjustment Protection SAS-TEC brest protection Held cloverleaf SAS-TEC shoulder & elbow protectors SAS-TEC coccyx protection special Ripstop material reinforcement on crash zones SAS-TEC back protector rib protector made in special foam Sizes S (64x33) M (64x33) L (69x34) XL (69x34) XXL (76x35)