A surgical stapling apparatus comprising: a handle including an actuation trigger ; a tool assembly operatively coupled to the handle, the tool assembly including a first jaw member and a second jaw member ; and a buttress retention assembly including: a sleeve configured to be detachably coupled with the first jaw member, the sleeve including proximal and distal portions , the proximal portion including a proximal hook extending transversely outward from at least one lateral side of the proximal portion, the distal portion including a mouth defining an aperture , the mouth including a hook configured to be at least partially received in a knife slot of the first jaw member, the mouth including an inner surface having an inwardly extending distal hook; and a buttress material including a proximal end portion and a distal end portion , the buttress material including a tab extending transversely outward from a lateral side of the proximal end portion, the tab defining a proximal slot configured to receive the proximal hook of the sleeve, at least a portion of the distal end portion extending through the aperture of the mouth of the sleeve, the distal end portion defining a distal slot dimensioned to receive the distal hook of the sleeve. a handle including an actuation trigger ; a tool assembly operatively coupled to the handle, the tool assembly including a first jaw member and a second jaw member ; and a buttress retention assembly including: a sleeve configured to be detachably coupled with the first jaw member, the sleeve including proximal and distal portions , the proximal portion including a proximal hook extending transversely outward from at least one lateral side of the proximal portion, the distal portion including a mouth defining an aperture , the mouth including a hook configured to be at least partially received in a knife slot of the first jaw member, the mouth including an inner surface having an inwardly extending distal hook; and a buttress material including a proximal end portion and a distal end portion , the buttress material including a tab extending transversely outward from a lateral side of the proximal end portion, the tab defining a proximal slot configured to receive the proximal hook of the sleeve, at least a portion of the distal end portion extending through the aperture of the mouth of the sleeve, the distal end portion defining a distal slot dimensioned to receive the distal hook of the sleeve. a sleeve configured to be detachably coupled with the first jaw member, the sleeve including proximal and distal portions , the proximal portion including a proximal hook extending transversely outward from at least one lateral side of the proximal portion, the distal portion including a mouth defining an aperture , the mouth including a hook configured to be at least partially received in a knife slot of the first jaw member, the mouth including an inner surface having an inwardly extending distal hook; and a buttress material including a proximal end portion and a distal end portion , the buttress material including a tab extending transversely outward from a lateral side of the proximal end portion, the tab defining a proximal slot configured to receive the proximal hook of the sleeve, at least a portion of the distal end portion extending through the aperture of the mouth of the sleeve, the distal end portion defining a distal slot dimensioned to receive the distal hook of the sleeve. <EOS>