POLBAN ADVANCE P7310 hip seat in ripstop all-black, compatible with a single shoulder strap. - Model Name: POLBAN ADVANCE P7310 - Color: Gray - Type: Hip seat - Shoulder Type: Single shoulder - Brand: LUCKY 1934 #HipSeat #BabyCarrier #Polban #POLBAN Thank you for viewing. I purchased this about two years ago and used it about 5 or 6 times, but it has been stored at home without much use. I hope someone who can use it will take it while it's still in good condition! It comes with a single shoulder strap for added stability! There is no box, so I will ship it in simple packaging.