Lightweight, breathable back protection (EN 1621-1:2012 / L1) with a low profile. The Amp Protection Tank provides full coverage of the back through our central and removable SAS-TEC L1 back protector. The elastic and grippy hem makes sure everything stays in place. Mesh inserts and 3D mesh ventilation provide superior breathability, making sure you'll always want to wear this under your jersey. Two easily accessible stash pockets on the back provide storage for snacks, juices and other ride essentials.