A bicycle cover comprising: a first material piece, a second material piece, a joining portion for joining the first material piece and the second material piece, and a first resilient element provided about a periphery of the first material piece, the bicycle cover having a folded configuration in which portions of the first material piece and the second material piece lie adjacent one another and an expanded configuration in which the cover is adapted to receive a bicycle between the first and second material pieces, the first resilient element being biased to urge the cover towards the expanded configuration; and in which in the expanded configuration the cover defines a gap between the first material piece and the second material piece around at least a portion of the periphery of the first material piece and at least a portion of a periphery of the second material piece, characterized by the cover further comprising a closure portion for at least partially closing the gap, the closure portion being attachable to the first material piece and comprising: a first engagement portion releasably engageable with a second engagement portion of the second material piece to at least partially close the gap and a third engagement portion releasably engageable with a fourth engagement portion of the second material piece to at least partially close the gap, the first and third engagement portions being spaced from one another, and the closure portion comprising a material portion between the first and third engagement portions. a first material piece, a second material piece, a joining portion for joining the first material piece and the second material piece, and a first resilient element provided about a periphery of the first material piece, the bicycle cover having a folded configuration in which portions of the first material piece and the second material piece lie adjacent one another and an expanded configuration in which the cover is adapted to receive a bicycle between the first and second material pieces, the first resilient element being biased to urge the cover towards the expanded configuration; and in which in the expanded configuration the cover defines a gap between the first material piece and the second material piece around at least a portion of the periphery of the first material piece and at least a portion of a periphery of the second material piece, characterized by the cover further comprising a closure portion for at least partially closing the gap, the closure portion being attachable to the first material piece and comprising: a first engagement portion releasably engageable with a second engagement portion of the second material piece to at least partially close the gap and a third engagement portion releasably engageable with a fourth engagement portion of the second material piece to at least partially close the gap, the first and third engagement portions being spaced from one another, and the closure portion comprising a material portion between the first and third engagement portions. a first engagement portion releasably engageable with a second engagement portion of the second material piece to at least partially close the gap and a third engagement portion releasably engageable with a fourth engagement portion of the second material piece to at least partially close the gap,