specification: Item Type: Sit Up Exercise Bar_x000D_Material: Cotton_x000D_Color: Black_x000D_Suitable: For dormitory bed, low board bed _x000D_Functions: Thin arm, shape butt, thin abdomen (practice vest line), thin legs. _x000D_Applicable Crowd: Suitable for the women who hate cumbersome installation, no energy to lift the mattress bed board. The first choice of bed fitness device, to ensure that can be installed on all the height of the bed. Features: 1Mainly composed of pressure lever, connecting cloth strip and buckle, which is easy to install. 2Made of soft cotton, which is durable and can effective protect your instep from pain. 3Suitable for many types of bed, 5 seconds to install and disassemble, which is very convenient. 4Helping you exercise at home to thin your arms, legs and abdomen, help you practice vest line. 5Light weight, easy to carry and storage, which allow you can work out at anytime. PackageList: 1 x Sit Up Exercise Bar