"SIZE S --- Length x Width: 7.87x 7.87 inch(20 x 20 cm), fit for hamster, golden bear, baby rat, sugar glider and etc.^ MATERIAL --- Made of cozy, soft and superb quality material, coral fleece + arctic fleece, itll provide a secure and super comfy resting spot for your lovely one, offers unmatch warmth and comfort.^ NECESSARITY OF HAMMOCK --- Full use of the large space of the cage, hammock is always a great cage accessory to makes the cage more stereoscopic by attaching to the cage with clips.^ DOUBLE-LAYER BED --- Double layers for the pet shuttling, its a good option to meet their nature of addicting running in the tunnel back and forth, to be as a good entertainment stage, which they can either lounge on the top layer or snuggle in the bottom one.^ EASY TO USE --- Easy and quickly attaches to cage interiors with included 4 metal hooks."