Pannier bag rack pack anzahl 2 material polyester types pd 620 ps 490 coating pvc coated capacity 70 litres attachment quick lock 21 material properties waterproof safety features reflective print fastener roll closure features shoulder strap innenaufteilungen main compartment inner pockets outside pockets mesh pocket dimensions w x h x d 45 x 3624 x 26 cm weight 2 368 g colours black grey series ortlieb back roller