This all new enclosed motorhome cycle cover is fully zipped and capable of covering 4 adult bikes. The covers are produced here in the UK using a top quality weatherproof 300D nylon (unlike the thin 210D material used by most manufacturers) The back has a velcro opening allowing it to be fitted snugly round the cycle rack frame on the motorhome side of the cover. It also comes with 2 webbing straps to enable the cover to be tightened up around the bikes whilst in transit. Having spoken to users of these types of cycle covers we have also put drain eyelets in the bottom of the cover as this seemed a problem with other well known brands as it is impossible to keep all water out in extreme weather even though the cycles are enclosed.) The cover comes with a transparent pocket to take a 50cm x 50cm Warning sign which will be included with your cover. Please note these are only suitable for motorhome cycle racks not for car mounted or offset racks which protrude under,over or sideways of the vehicle. The cover also comes with a handy storage bag. More money but also more quality !!