New in original packaging. Size Large
 
From the manufacturer:
 
AXIAL AX2 Back Protector
Features:
Soft temperature stabile comfort and flexibility
Advanced viscoelastic polymer foam (AVP) for improved shock absorption
AVP molecules stiffen at impact for versatile range of performance
Light weight reduces fatigue and aid movement while riding
Vented designs provide air circulation to keep you cool and comfortable
Impact energy is evenly dispersed
More flexible and well ventilated than AX1
CE Level 2 certified
Meets requirements of CE Norm EN 1621-2 2014 Level 2
Fitment: 
BILT: All jackets fit MD back protector, with the exception of the Arcadia Women's Jacket which fits SM back protector
Sedici: All jackets fit MD back protector
Street & Steel: All jackets fit MD back protector, with the exception of the Nightstar Women's Vest which fits SM back protector
REAX: XS-MD men's jackets fit MD back protector, LG-3XL men's jackets fit LG back protector
All REAX women's jackets fit MD back protector
Other Brands: Measure pocket and choose a size based on the dimensions below
Dimensions:
SM - 13" x 9.25" X .75" - 10.5oz
MD - 15.5” x 11.2” x .75” - 12.75oz
LG - 17.5” x 12.75” x .75” - 16oz