Poc spine vpd air teepocs spine vpd air tee is a versatile long sleeve t shirt with 2 ply elbow and back protection it features a highly proficient ventilation system for optimal moisture management and comfort the polyamide construction ensures low friction and high abrasion resistance vpd is the ultimate material for mtb as it wraps around the body shape when warm for greater freedom of movement on the bike upon impact the vpd technology hardens to minimise injury featureslow friction