A bag house filter bag is suspended vertically from a separable hanger. The filter bag has a closure at the top, which is constructed by a series of tucks and folds. The closure also provides a support loop for engagement with the hanger. The filter bag is constructed mainly of woven fabric formed into a cylinder. The folding and stitching pattern of the fabric at the top end enables the bag to transition from linear at the site of the support loop to cylindrical with an even distribution of stress on the fabric. The hanger includes a cross member and a surrounding tube to reduce specific stress on the fabric. The hanger has a removable joint opening clasp at one end of the cross member to enable rapid insertion and removal of the hanger from within the suspension tube without contact, removal or other disturbance of the filter bag.