Evenflo Door frame jumper seat Features & details JUMPING HELPS BUILD CORE MUSCLE DEVELOPMENT while providing entertainment and exercise, without taking up floor space! EASY-TO-USE CLAMP makes moving the baby jumper from room to room a breeze ADJUSTABLE STRAPS mean you can customize the height on this doorway jumper for your child NO-TOOL SET UP means this jolly jumper for baby is perfect to throw in a travel bag for day trips or vacations SOFT FABRICS on this johnny jump up are wipeable and machine-washable, a convenience you'll love! Fits standard doorways that are 3 to 6" thick with firmly affixed door trim at least ½"wide Jumping promotes fun and healthy activity for baby Framed seat fully surrounds child Fully enclosed spring prevents child's fingers from touching while also preventing dirt from collecting in the active spring Adjustable straps allow you to adjust to the baby's changing height and weight